Protocol Registries

Protocol parameter registries represent the authoritative record of many of the codes and numbers contained in a variety of Internet protocols. We maintain these records in compliance with the associated technical standards and allocation policies, and we provide this service in coordination with the Internet Engineering Task Force (IETF).

To view or download individual protocol registries, navigate to the individual registries through the index below. Registry data is available for bulk retrieval via Rsync (recommended) orFTP.

To obtain a registration in an existing registry, or to modify existing registrations,consult the relevant application form. For information on creating new registries, please seeRFC 8126 for guidance.

A B C D E F G H I J K L M N O P Q R S T U V W X Y

Protocol/Registry	Defining Document/Comments
A
Access Node Control Protocol (ANCP)
ANCP Capability Types	RFC 6320 Standards Action
ANCP Command Codes	RFC 6320 Standards Action
ANCP Message Types	RFC 6320 Standards Action
ANCP Port Management Functions	RFC 6320 Standards Action
ANCP Result Codes	RFC 6320 0x0-0xFFF: IETF Review. 0x1000-0xFFFFFF: Specification Required. (Expert: Unassigned)
ANCP Technology Types	RFC 6320 Expert Review (Expert: Unassigned)
ANCP TLV Types	RFC 6320 0x0000-0x1FFF: IETF Review. 0x2000-0xFFFF: Specification Required. (Expert: Unassigned)
Joint GSMP / ANCP Version Registry	RFC 6320 Standards Action
ACL TLS
ACL (D)TLS Parameters	Internet Draft draft-ietf-opsawg-mud-tls-18 Expert Review (Expert: Unassigned)
ACL DTLS Version Codes	Internet Draft draft-ietf-opsawg-mud-tls-18 Expert Review (Expert: Unassigned)
ACL TLS Version Codes	Internet Draft draft-ietf-opsawg-mud-tls-18 Expert Review (Expert: Unassigned)
Ad Hoc On Demand Distance Vector (AODV) Parameters
AODV Extension Types	RFC 3561 Standards Action
AODV Message Types (for messages sent to port 654)	RFC 3561 Standards Action
Address Family Numbers
Address Family Numbers	RFC 2453,RFC 2677,RFC 2858 1-16383: Standards Action. 16384-32767: First Come First Served.
Address Resolution Protocol (ARP) Parameters
Hardware Types	RFC 826,RFC 5494 requests for values below 256: Expert Review. requests for more than one value: Expert Review. requests for one value greater than 255: First Come First Served. requests for one value, no value specified: First Come First Served. (Expert: Carlos Pignataro)
Operation Codes	RFC 826,RFC 5494 IETF Review or IESG Approval
Protocol Type	RFC 826,RFC 5494,RFC 5342 The Ethertype space is administered as described in [RFC5342].
APEX Parameters
Applicable Exchange Core (APEX) Endpoint Applications	RFC 3340 Expert Review (Expert: Unassigned)
Applicable Exchange Core (APEX) Options	RFC 3340 Expert Review (Expert: Unassigned)
Applicable Exchange Core (APEX) Services	RFC 3340 Expert Review (Expert: Unassigned)
Application Access Protocol (ACAP) Numbers
ACAP Capabilities	RFC 2244 Specification Required (Expert: Unassigned)
ACAP Response Codes	RFC 2244 First Come First Served
Dataset Classes	RFC 2244 Standards Action or IESG-Approved Experimental RFC
Vendor Subtrees	RFC 2244,RFC 6075 First Come First Served
Application Bridging for Federated Access Beyond Web (ABFAB) Parameters
ABFAB URN Parameters	RFC 7833 IETF Review or Expert Review (Expert: Unassigned)
Application-Layer Traffic Optimization (ALTO) Protocol
ALTO Address Types	RFC 7285 IETF Review
ALTO Cost Metrics	RFC 7285 IETF Review
ALTO Cost Modes	RFC 9274 IETF Review
ALTO Cost Source Types	RFC 9439 IETF Review
ALTO Endpoint Property Types	RFC 7285 IETF Review
ALTO Entity Domain Types	RFC 9240 IETF Review
ALTO Entity Property Types	RFC 9240 IETF Review
ALTO Error Codes	RFC 7285 IETF Review
Authenticated Encryption with Associated Data (AEAD) Parameters
AEAD Algorithms	RFC 5116 1-32767: Specification Required. 32768-65535: Private Use. (Expert: David McGrew, Bjoern Tackmann, Stanislav Smyshlyaev)
Authentication and Authorization for Constrained Environments (ACE)
ACE Authorization Server Request Creation Hints	RFC 9200 less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action. 256 to 65535: Specification Required. greater than 65535: Expert Review. (Expert: Göran Selander, Cigdem Sengul)
ACE Groupcomm Errors	RFC 9594 less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. greater than 65535: Expert Review. (Expert: Francesca Palombini, Marco Tiloca, Rikard Höglund)
ACE Groupcomm Key Types	RFC 9594 less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. greater than 65535: Expert Review. Strings of length 1: Standards Action With Expert Review. Strings of length 2: Specification Required. Strings of length greater than 2: Expert Review. (Expert: Francesca Palombini, Marco Tiloca, Rikard Höglund)
ACE Groupcomm Parameters	RFC 9594 less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. greater than 65535: Expert Review. Strings of length 1: Standards Action With Expert Review. Strings of length 2: Specification Required. Strings of length greater than 2: Expert Review. (Expert: Francesca Palombini, Marco Tiloca, Rikard Höglund)
ACE Groupcomm Policies	RFC 9594 less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. greater than 65535: Expert Review. Strings of length 1: Standards Action With Expert Review. Strings of length 2: Specification Required. Strings of length greater than 2: Expert Review. (Expert: Francesca Palombini, Marco Tiloca, Rikard Höglund)
ACE Groupcomm Profiles	RFC 9594 less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. greater than 65535: Expert Review. (Expert: Francesca Palombini, Marco Tiloca, Rikard Höglund)
ACE Groupcomm Rekeying Schemes	RFC 9594 less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. greater than 65535: Expert Review. (Expert: Francesca Palombini, Marco Tiloca, Rikard Höglund)
ACE Profiles	RFC 9200 less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action. 256 to 65535: Specification Required. greater than 65535: Expert Review. (Expert: Göran Selander, Cigdem Sengul)
ACE Token Revocation List Errors	Internet Draft draft-ietf-ace-revoked-token-notification-09 less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. greater than 65535: Expert Review. (Expert: Unassigned)
ACE Token Revocation List Parameters	Internet Draft draft-ietf-ace-revoked-token-notification-09 less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. greater than 65535: Expert Review. (Expert: Unassigned)
OAuth Access Token Type CBOR Mappings	RFC 9200 less than -65536: Private Use. -65536 or greater: Expert Review. (Expert: Göran Selander, Cigdem Sengul)
OAuth Error Code CBOR Mappings	RFC 9200 less than -65536: Private Use. -65536 or greater: Expert Review. (Expert: Göran Selander, Cigdem Sengul)
OAuth Grant Type CBOR Mappings	RFC 9200 less than -65536: Private Use. -65536 or greater: Expert Review. (Expert: Göran Selander, Cigdem Sengul)
OAuth Parameters CBOR Mappings	RFC 9200 less than -65536: Private Use. -65536 or greater: Expert Review. (Expert: Göran Selander, Cigdem Sengul)
OAuth Token Introspection Response CBOR Mappings	RFC 9200 less than -65536: Private Use. -65536 or greater: Expert Review. (Expert: Göran Selander, Cigdem Sengul)
OSCORE Security Context Parameters	RFC 9203 less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. greater than 65535: Expert Review. Strings of length 1: Standards Action With Expert Review. Strings of length 2: Specification Required. Strings of length greater than 2: Expert Review. (Expert: Göran Selander, Cigdem Sengul)
Sequence Number Synchronization Methods	RFC 9594 less than -65536: Private Use. -65536 to -257: Specification Required. -256 to 255: Standards Action With Expert Review. 256 to 65535: Specification Required. greater than 65535: Expert Review. Strings of length 1: Standards Action With Expert Review. Strings of length 2: Specification Required. Strings of length greater than 2: Expert Review. (Expert: Francesca Palombini, Marco Tiloca, Rikard Höglund)
Authentication and Key Agreement (AKA)
AKA-Version Namespace	RFC 3310 Expert Review (Expert: Vesa Torvinen (primary), Jari Arkko (secondary))
Authentication Method Reference Values
Authentication Method Reference Values	RFC 8176 Expert Review (Expert: John Bradley, Mike Jones)
Authentication Option Name Spaces
Algorithm Name Space Values	RFC 3118 IETF Review
Protocol Name Space Values	RFC 3118 IETF Review
RDM Name Space Values	RFC 3118 IETF Review
Authentication, Authorization, and Accounting (AAA) Parameters
Application IDs	RFC 6733,RFC 6942 0-16777215: Specification Required. 16777216-4294967294: First Come First Served. (Expert: Unassigned)
AVP Codes	RFC 6733 block allocation (release of more than three AVPs at a time for a given purpose): IETF Review. other allocation: Specification Required. (Expert: Lionel Morand (primary), Jouni Korhonen (secondary))
AVP Flags Value	RFC 6733 Standards Action
AVP Specific Values	RFC 6733 IETF Review (unless otherwise specified)
Command Codes	RFC 6733,RFC 5719 0-255: Reserved for RADIUS backward compatibility. 256-8388607: IETF Review. 8388608-16777213: First Come First Served with specification.
Command Flags	RFC 6733 Standards Action
Mobility Capability Registry	RFC 5447 Specification Required (Expert: Jouni Korhonen)
QoS Profiles	RFC 5624 0-511: Standards Action. 512-32767: Specification Required. 32768-429496729: Reserved. (Expert: Unassigned)
Author Domain Signing Practices (ADSP) Parameters
ADSP Outbound Signing Practices	RFC 5617 Registry closed
ADSP Specification Tags	RFC 5617 Registry closed
Automated Certificate Management Environment (ACME) Protocol
ACME Account Object Fields	RFC 8555 Specification Required (Expert: Richard Barnes)
ACME Authority Token Challenge Types	RFC 9447 Specification Required (Expert: Mary Barnes)
ACME Authorization Object Fields	RFC 8555 Specification Required (Expert: Richard Barnes)
ACME Directory Metadata Auto-Renewal Fields	RFC 8739 Specification Required (Expert: Yaron Sheffer, Diego R. Lopez, Thomas Fossati)
ACME Directory Metadata Fields	RFC 8555 Specification Required (Expert: Richard Barnes)
ACME Error Types	RFC 8555 Specification Required (Expert: Richard Barnes)
ACME Identifier Types	RFC 8555 Specification Required (Expert: Richard Barnes)
ACME Order Auto-Renewal Fields	RFC 8739 Specification Required (Expert: Yaron Sheffer, Diego R. Lopez, Thomas Fossati)
ACME Order Object Fields	RFC 8555 Specification Required (Expert: Richard Barnes)
ACME Renewal Info Object Fields	Internet Draft draft-ietf-acme-ari-08 Specification Required (Expert: Unassigned)
ACME Resource Types	RFC 8555 Specification Required (Expert: Richard Barnes)
ACME Validation Methods	RFC 8555 Specification Required (Expert: Richard Barnes)
STAR Delegation CSR Template Extensions	RFC 9115 Specification Required (Expert: Yaron Sheffer, Diego R. Lopez, Thomas Fossati)
Automatic Responses to Electronic Mail Parameters
Auto-Submitted Header Field Keywords	RFC 5436 Specification Required (Expert: Unassigned)
Auto-Submitted header field optional parameters	RFC 3834 IETF Review
Autonomic Control Plane (ACP)
ACP Address Type	RFC 8994 Standards Action
Autonomous System (AS) Numbers
16-bit Autonomous System Numbers	RFC 1930,RFC 5398,RFC 6996,RFC 7249 RIR request to the IANA or IETF Review. Allocated following the Global Policy published athttp://www.icann.org/en/resources/policy/global-addressing.
32-bit Autonomous System Numbers	RFC 1930,RFC 5398,RFC 6793,RFC 6996,RFC 7249 RIR request to the IANA or IETF Review. Allocated following the Global Policy published athttp://www.icann.org/en/resources/policy/global-addressing.
Special-Purpose AS Numbers	RFC 7249 IETF Review
B
Babel Routing Protocol
Babel Address Encodings	RFC 8966 0-223: Specification Required. 224-254: Experimental Use. (Expert: Juliusz Chroboczek, Donald Eastlake)
Babel Hello Flags Values	RFC 8966 Specification Required (Expert: Juliusz Chroboczek, Donald Eastlake)
Babel Sub-TLV Types	RFC 8966 0-111: Specification Required. 112-126: Experimental Use. 128-239: Specification Required. 240-254: Experimental Use. (Expert: Juliusz Chroboczek, Donald Eastlake)
Babel TLV Types	RFC 8966 0-223: Specification Required. 224-254: Experimental Use. (Expert: Juliusz Chroboczek, Donald Eastlake)
Babel Update Flags Values	RFC 8966 Specification Required (Expert: Juliusz Chroboczek, Donald Eastlake)
Battery Technologies
Battery Technologies	RFC 7577 Expert Review (Expert: Unassigned)
BGP Monitoring Protocol (BMP) Parameters
BMP Initiation Information TLVs	RFC 7854,RFC 9069,RFC 9515,RFC 9736 0-32767: Standards Action. 32768-65530: First Come First Served. 65531-65534: Experimental Use.
BMP Message Types	RFC 7854 0-127: Standards Action. 128-250: Specification Required. 251-254: Experimental Use. (Expert: John G. Scudder, Rex Fernando (rex), Paolo Lucente)
BMP Peer Down Reason Codes	RFC 7854 0-127: Standards Action. 128-250: Specification Required. 251-254: Experimental Use. (Expert: John G. Scudder, Rex Fernando (rex), Paolo Lucente)
BMP Peer Flags for Loc-RIB Instance Peer Type 3	RFC 9069 Standards Action
BMP Peer Flags for Peer Types 0 through 2	RFC 7854,RFC 9069 Standards Action
BMP Peer Types	RFC 7854 0-127: Standards Action. 128-250: Specification Required. 251-254: Experimental Use. (Expert: John G. Scudder, Rex Fernando (rex), Paolo Lucente)
BMP Peer Up Message TLVs	RFC 9736 0, 3-32767: Standards Action. 32768-65530: First Come First Served. 65531-65534: Experimental Use.
BMP Route Mirroring Information Codes	RFC 7854,RFC 9515 0-32767: Standards Action. 32768-65530: First Come First Served. 65531-65534: Experimental Use.
BMP Route Mirroring TLVs	RFC 7854,RFC 9515 0-32767: Standards Action. 32768-65530: First Come First Served. 65531-65534: Experimental Use.
BMP Statistics Types	RFC 7854,RFC 9515 0-32767: Standards Action. 32768-65530: First Come First Served. 65531-65534: Experimental Use.
BMP Termination Message Reason Codes	RFC 7854,RFC 9515 0-32767: Standards Action. 32768-65530: First Come First Served. 65531-65534: Experimental Use.
BMP Termination Message TLVs	RFC 7854,RFC 9515 0-32767: Standards Action. 32768-65530: First Come First Served. 65531-65534: Experimental Use.
BGP Shortest Path First (BGP SPF)
BGP-LS-SPF Link NLRI Attribute SPF Status TLV Status	Internet Draft draft-ietf-lsvr-bgp-spf-51 IETF Review
BGP-LS-SPF Node NLRI Attribute SPF Status TLV Status	Internet Draft draft-ietf-lsvr-bgp-spf-51 Expert Review (Expert: Unassigned)
BGP-LS-SPF Prefix NLRI Attribute SPF Status TLV Status	Internet Draft draft-ietf-lsvr-bgp-spf-51 IETF Review
Bidirectional Forwarding Detection (BFD) Parameters
BFD Authentication Types	RFC 5880 Expert Review (Expert: Dave Ward (backup experts: Dave Katz, Jeff Haas, Les Ginsberg))
BFD Diagnostic Codes	RFC 5880 Expert Review (Expert: Dave Ward (backup experts: Dave Katz, Jeff Haas, Les Ginsberg))
Bit Index Explicit Replication (BIER)
BIER Algorithm	RFC 8401,RFC 9272 0-127: Standards Action. 128-239: Specification Required. 240-254: Private or Experimental Use. (Expert: Les Ginsberg, Chris Hopps)
BIER Next Protocol Identifiers	RFC 8296 IETF Review
Blocks Extensible Exchange Protocol (BEEP) Parameters
BEEP Features	RFC 3080 Expert Review (Expert: Marshall T. Rose)
BEEP Profiles	RFC 3080 Expert Review (Expert: Marshall T. Rose)
Bootstrapping Remote Secure Key Infrastructures (BRSKI) Parameters
BRSKI Well-Known URIs	RFC 8995 Specification Required (Expert: Michael Richardson, Toerless Eckert)
Pledge BRSKI Status Telemetry Attributes	RFC 8995 Specification Required (Expert: Michael Richardson)
Border Gateway Protocol (BGP) Parameters
Additional PMSI Tunnel Attribute Flags	RFC 7902 Standards Action
ARP/ND Extended Community Flags	RFC 9047 Standards Action
BFD Discriminator Optional TLV Type	RFC 9026 0-175: IETF Review. 176-249: First Come First Served. 250-254: Experimental Use. 255: IETF Review.
BFD Mode	RFC 9026 0-175: IETF Review. 176-249: First Come First Served. 250-254: Experimental Use. 255: IETF Review.
BGP AIGP Attribute Types	RFC 7311 Standards Action
BGP BIER TLV and Sub-TLV Types	Internet Draft draft-ietf-bier-idr-extensions-19 First Come First Served
BGP CAR NLRI TLV Types	Internet Draft draft-ietf-idr-bgp-car-16 Specification Required (Expert: Unassigned)
BGP CAR NLRI Types	Internet Draft draft-ietf-idr-bgp-car-16 Specification Required (Expert: Unassigned)
BGP Data Collection Standard Communities	RFC 4384 IETF Review
BGP Error (Notification) Codes	RFC 4271,RFC 7313 Standards Action
BGP Error Subcodes	RFC 4271 Standards Action
BGP Graceful Restart Flags	RFC 4724,RFC 8538 Standards Action
BGP Graceful Restart Flags for Address Family	RFC 4724,RFC 8538 Standards Action
BGP Layer 2 Encapsulation Types	RFC 6624 0-127: Expert Review. 128-251: First Come First Served. 252-255: Experimental Use.
BGP Layer 2 TLV Types	RFC 6624 0-127: Expert Review. 128-251: First Come First Served. 252-255: Experimental Use.
BGP MCAST-VPN Route Types	RFC 7441,RFC 6514 Standards Action
BGP Message Types	RFC 4271 Standards Action
BGP Non-Transitive Extended Community Types	RFC 7153 0x40-0x7f: First Come First Served. 0xc0-0xcf: Reserved for Experimental Use. 0xd0-0xff: Standards Action.
BGP OPEN Optional Parameter Types	RFC 5492 IETF Review
BGP Outbound Route Filtering (ORF) Types	RFC 5291 0-63: Standards Action. 64-127: First Come First Served. 128-255: Vendor-Specific.
BGP Path Attributes	RFC 4271 Standards Action
BGP Prefix-SID Label-Index TLV Flags	RFC 8669 Expert Review (Expert: Acee Lindem, Hannes Gredler)
BGP Prefix-SID Originator SRGB TLV Flags	RFC 8669 Expert Review (Expert: Acee Lindem, Hannes Gredler)
BGP Prefix-SID TLV Types	RFC 8669 Expert Review (Expert: Acee Lindem, Hannes Gredler)
BGP Role Value	RFC 9234 IETF Review
BGP Route Refresh Subcodes	RFC 7313 0-127: Standards Action. 128-254: First Come First Served.
BGP SRv6 Service SID Flags	RFC 9252 IETF Review
BGP Transitive Extended Community Types	RFC 7153,RFC 9184 0x00-0x3f: First Come First Served. 0x80-0x82: First Come First Served. 0x83-0x8f: Reserved for Experimental Use. 0x90-0xbf: Standards Action.
BGP Well-known Communities	RFC 1997,RFC 8642 0x00000000-0x0000FFFF: Reserved. 0x00010000-0xFFFEFFFF: Private Use. 0xFFFF0000-0xFFFF8000: First Come First Served. 0xFFFF8001-0xFFFFFFFF: Standards Action.
Capability Codes	RFC 5492,RFC 8810 1-63: IETF Review. 64-238: First Come First Served. 239-254: Experimental Use.
Context-Specific Label Space ID Type	RFC 9573 First Come First Served
DF Alg	RFC 8584 RFC Required
DF Election Capabilities	RFC 8584 RFC Required
E-Tree Flags	RFC 8317 RFC Required
EVPN ESI Label Extended Community Flags	RFC 9746 IETF Review
EVPN Extended Community Sub-Types	RFC 7153 0x00-0xbf: First Come First Served. 0xc0-0xff: IETF Review.
EVPN Layer 2 Attributes Control Flags	RFC 8214 RFC Required
Generic Transitive Extended Community Part 2 Sub-Types	RFC 8955,RFC 9184 0x00-0xbf: First Come First Served. 0xc0-0xff: IETF Review.
Generic Transitive Extended Community Part 3 Sub-Types	RFC 8955,RFC 9184 0x00-0xbf: First Come First Served. 0xc0-0xff: IETF Review.
Generic Transitive Extended Community Sub-Types	RFC 7153,RFC 9184 0x00-0xbf: First Come First Served. 0xc0-0xff: IETF Review.
Layer2 Info Extended Community Control Flags Bit Vector	RFC 8395 IETF Review
Long-Lived Graceful Restart Flags for Address Family	RFC 9494 Standards Action
Multicast Flags Extended Community	RFC 9251 First Come First Served
Multihoming Redundancy Mode	RFC 9746 IETF Review
Non-Transitive Four-Octet AS-Specific Extended Community Sub-Types	RFC 7153 0x00-0xbf: First Come First Served. 0xc0-0xff: IETF Review.
Non-Transitive IPv4-Address-Specific Extended Community Sub-Types	RFC 7153 0x00-0xbf: First Come First Served. 0xc0-0xff: IETF Review.
Non-Transitive IPv6-Address-Specific Extended Community Types	RFC 7153 First Come First Served
Non-Transitive Opaque Extended Community Sub-Types	RFC 7153 0x00-0xbf: First Come First Served. 0xc0-0xff: IETF Review.
Non-Transitive Transport Class Extended Community Sub-Types	Internet Draft draft-ietf-idr-bgp-ct-39 0x00-0xbf: First Come First Served. 0xc0-0xff: IETF Review.
Non-Transitive Two-Octet AS-Specific Extended Community Sub-Types	RFC 7153 0x00-0xbf: First Come First Served. 0xc0-0xff: IETF Review.
P-Multicast Service Interface (PMSI) Tunnel Attribute Flags	RFC 7902 Standards Action
P-Multicast Service Interface Tunnel (PMSI Tunnel) Tunnel Types	RFC 7385,RFC 8317 0x00-0x7A: IETF Review. 0x7B-0x7E: Experimental Use. 0x80-0xFA: Composite Tunnel. 0xFB-0xFE: Experimental Use. 0xFF: Standards Action.
Region Identifiers (<R>)	RFC 4384 Not defined
SFC Extended Community Sub-Types	RFC 9015 First Come First Served
SFC SPI/SI Representation Flags	RFC 9015 Standards Action
SFP Association Type	RFC 9015 First Come First Served
SFP Attribute TLVs	RFC 9015 First Come First Served
Split-Horizon Type	RFC 9746 IETF Review
SRv6 Service Data Sub-Sub-TLV Types	RFC 9252 0-127: IETF Review. 128-254: First Come First Served. 255: IETF Review.
SRv6 Service Sub-TLV Types	RFC 9252 0-127: IETF Review. 128-254: First Come First Served. 255: IETF Review.
Traffic Action Fields	RFC 8955 IETF Review
Transitive Four-Octet AS-Specific Extended Community Sub-Types	RFC 7153 0x00-0xbf: First Come First Served. 0xc0-0xff: IETF Review.
Transitive IPv4-Address-Specific Extended Community Sub-Types	RFC 7153 0x00-0xbf: First Come First Served. 0xc0-0xff: IETF Review.
Transitive IPv6-Address-Specific Extended Community Types	RFC 7153 First Come First Served
Transitive Opaque Extended Community Sub-Types	RFC 7153 0x00-0xbf: First Come First Served. 0xc0-0xff: IETF Review.
Transitive Transport Class Extended Community Sub-Types	Internet Draft draft-ietf-idr-bgp-ct-39 0x00-0xbf: First Come First Served. 0xc0-0xff: IETF Review.
Transitive Two-Octet AS-Specific Extended Community Sub-Types	RFC 7153 0x00-0xbf: First Come First Served. 0xc0-0xff: IETF Review.
Border Gateway Protocol (BGP) Tunnel Encapsulation
BGP Tunnel Encapsulation Attribute Sub-TLVs	RFC 9012 1-63: Standards Action. 64-125: First Come First Served. 126-127: Experimental Use. 128-191: Standards Action. 192-252: First Come First Served. 253-254: Experimental Use.
BGP Tunnel Encapsulation Attribute Tunnel Types	RFC 9012 First Come First Served
Color Extended Community Color-Only Types	Internet Draft draft-ietf-idr-sr-policy-safi-13 Standards Action
Color Extended Community Flags	RFC 9012 Standards Action
Embedded Label Handling Sub-TLVs	RFC 9012 Standards Action
Flags Field of NVGRE Encapsulation Sub-TLVs	RFC 9012 Standards Action
Flags Field of VXLAN Encapsulation Sub-TLVs	RFC 9012 Standards Action
SR Policy Binding SID Flags	Internet Draft draft-ietf-idr-sr-policy-safi-13 Standards Action
SR Policy Segment Flags	Internet Draft draft-ietf-idr-sr-policy-safi-13 IETF Review
SR Policy Segment List Sub-TLVs	Internet Draft draft-ietf-idr-sr-policy-safi-13 IETF Review
SR Policy SRv6 Binding SID Flags	Internet Draft draft-ietf-idr-sr-policy-safi-13 Standards Action
Border Gateway Protocol - Link State (BGP-LS) Parameters
BGP-LS IGP Prefix Flags	RFC 9552 Expert Review (Expert: Adrian Farrel, Hannes Gredler)
BGP-LS MPLS Protocol Mask	RFC 9552 Expert Review (Expert: Adrian Farrel, Hannes Gredler)
BGP-LS NLRI and Attribute TLVs	RFC 9552 0-255: Reserved (not to be allocated). 256-64999: Expert Review. 65000-65535: Private Use. (Expert: Hannes Gredler (primary), Adrian Farrel (secondary))
BGP-LS NLRI Types	RFC 9552 1-64999: Expert Review. 65000-65535: Private Use. (Expert: Hannes Gredler (primary), Adrian Farrel (secondary))
BGP-LS Node Flags	RFC 9552 Expert Review (Expert: Adrian Farrel, Hannes Gredler)
BGP-LS Protocol-IDs	RFC 9552 1-199: Expert Review. 200-255: Private Use. (Expert: Hannes Gredler (primary), Adrian Farrel (secondary))
BGP-LS SR Policy Metric Types	Internet Draft draft-ietf-idr-bgp-ls-sr-policy-17 Expert Review (Expert: Unassigned)
BGP-LS SR Segment Descriptor Types	Internet Draft draft-ietf-idr-bgp-ls-sr-policy-17 Expert Review (Expert: Unassigned)
BGP-LS Well-Known Instance-IDs (OBSOLETE)	RFC 9552 Registry closed
SRv6 BGP EPE SID Flags	RFC 9514 Standards Action
BPF Instructions
BPF Instruction Conformance Groups	RFC 9669 Permanent: Standards Action or IESG Approval. Provisional: Specification Required. Historical: Specification Required. (Expert: Alexei Starovoitov, David Vernet)
BPF Instruction Set	RFC 9669 Permanent: Standards Action or IESG Approval. Provisional: Specification Required. Historical: Specification Required. (Expert: Alexei Starovoitov, David Vernet)
Building Blocks
Building Blocks	RFC 3048 Specification Required (Expert: Unassigned)
Bundle Protocol
Block Processing Control Flags	RFC 6255,RFC 9171 Specification Required (Expert: Scott Burleigh, Fred Templin)
BPSec BCB-AES-GCM AAD Scope Flags	RFC 9173 Specification Required (Expert: Ken McKeever, Edward Birrane)
BPSec BIB-HMAC-SHA2 Integrity Scope Flags	RFC 9173 Specification Required (Expert: Ken McKeever, Edward Birrane)
BPSec Security Context Identifiers	RFC 9172 Specification Required (Expert: Ken McKeever, Edward Birrane)
Bundle Administrative Record Types	RFC 7116,RFC 9713 Specification Required (Expert: Marc Blanchet, Keith Scott)
Bundle Block Types	RFC 6255,RFC 9171 Specification Required (Expert: Scott Burleigh, Fred Templin)
Bundle Custody Signal Reason Codes	RFC 6255 Specification Required (Expert: Scott Burleigh, Fred Templin)
Bundle Metadata Type Codes	RFC 6258 Specification Required (Expert: Rick Taylor)
Bundle Processing Control Flags	RFC 6255,RFC 9171 Specification Required (Expert: Scott Burleigh, Fred Templin)
Bundle Protocol TCP Convergence-Layer Message Types	RFC 7242 RFC Required
Bundle Protocol TCP Convergence-Layer REFUSE_BUNDLE Reason Codes	RFC 7242 RFC Required
Bundle Protocol TCP Convergence-Layer SHUTDOWN Reason Codes	RFC 7242 RFC Required
Bundle Protocol TCP Convergence-Layer Version 4 Message Types	RFC 9174 RFC Required
Bundle Protocol TCP Convergence-Layer Version 4 MSG_REJECT Reason Codes	RFC 9174 Specification Required (Expert: Brian Sipos, Rick Taylor)
Bundle Protocol TCP Convergence-Layer Version 4 SESS_TERM Reason Codes	RFC 9174 Specification Required (Expert: Brian Sipos, Rick Taylor)
Bundle Protocol TCP Convergence-Layer Version 4 Session Extension Types	RFC 9174 Expert Review (Expert: Brian Sipos, Rick Taylor)
Bundle Protocol TCP Convergence-Layer Version 4 Transfer Extension Types	RFC 9174 Expert Review (Expert: Brian Sipos, Rick Taylor)
Bundle Protocol TCP Convergence-Layer Version 4 XFER_REFUSE Reason Codes	RFC 9174 Specification Required (Expert: Brian Sipos, Rick Taylor)
Bundle Protocol TCP Convergence-Layer Version Numbers	RFC 7242 RFC Required
Bundle Protocol URI Scheme Types	RFC 9171 Standards Action
Bundle Status Report Flags	RFC 6255 RFC Required
Bundle Status Report Reason Codes	RFC 6255,RFC 9171 Specification Required (Expert: Scott Burleigh, Fred Templin)
CBHE Service Numbers	RFC 7116 0-63: Specification Required. 1024-65535: Specification Required. (Expert: Marc Blanchet, Keith Scott)
Ciphersuite Flags	RFC 6257 Specification Required (Expert: Stephen Farrell, Edward Birrane)
Ciphersuite Numbers	RFC 6257 Specification Required (Expert: Stephen Farrell, Edward Birrane)
Ciphersuite Parameters and Results Type Registry	RFC 6257 Specification Required (Expert: Stephen Farrell, Edward Birrane)
Primary Bundle Protocol Version	RFC 6255 RFC Required
C
C-DNS DNS Capture Format
C-DNS Address Event Types	RFC 8618 Expert Review (Expert: Jim Hague, Sara Dickinson, John Dickinson)
C-DNS Response Flags	RFC 8618 Expert Review (Expert: Jim Hague, Sara Dickinson, John Dickinson)
C-DNS Storage Flags	RFC 8618 Expert Review (Expert: Jim Hague, Sara Dickinson, John Dickinson)
C-DNS Transports	RFC 8618 Expert Review (Expert: Jim Hague, Sara Dickinson, John Dickinson)
Caller-ID Numbering Plans
Caller-ID Numbering Plans Tokens	RFC 3939 Standards Action
Candidate Access Router Discovery (CARD) Parameters
AVP Type Registry	RFC 4065 Expert Review (Expert: Unassigned)
Experimental Mobility Protocol Subtype Registry	RFC 4065 Specification Required and IESG Review (Expert: Unassigned)
Layer 2 Access Technology Identifier Registry	RFC 4065 Specification Required (Expert: Unassigned)
Captive Portals
Captive Portal API Keys	RFC 8908 Specification Required (Expert: Tommy Pauly, Darshak Thakore, Martin Thomson)
CBOR Object Signing and Encryption (COSE)
COSE Algorithms	RFC 9053,RFC 9054 Integers less than -65536: Private Use. Integer values from -65536 to -257: Specification Required. Integer values between -256 and 255: Standards Action With Expert Review. Integer values from 256 to 65535: Specification Required. Integer values greater than 65535: Expert Review. Strings of length 1: Standards Action With Expert Review. Strings of length 2: Specification Required. Strings of length greater than 2: Expert Review. (Expert: Göran Selander, Derek Atkins, Sean Turner)
COSE Elliptic Curves	RFC 9053 Integers less than -65536: Private Use. Integer values -65536 to -257: Specification Required. Integer values -256 to 255: Standards Action With Expert Review. Integer values 256 to 65535: Specification Required. Integer values greater than 65535: Expert Review. (Expert: Göran Selander, Derek Atkins, Sean Turner)
COSE Header Algorithm Parameters	RFC 9053 Expert Review (Expert: Göran Selander, Derek Atkins, Sean Turner)
COSE Header Parameters	RFC 9052 Integers less than -65536: Private Use. Integer values in the range -1 to -65536: delegated to the COSE Header Algorithm Parameters registry. Integer values between 1 and 255: Standards Action With Expert Review. Integer values from 256 to 65535: Specification Required. Integer values greater than 65535: Expert Review. Strings of length 1: Standards Action With Expert Review. Strings of length 2: Specification Required. Strings of length greater than 2: Expert Review. (Expert: Francesca Palombini, Carsten Bormann)
COSE Key Common Parameters	RFC 9052 Integers less than -65536: Private Use. Integer values in the range -65536 to -1: used for key parameters specific to a single algorithmdelegated to the COSE Key Type Parameters registry. Integer values between 0 and 255: Standards Action With Expert Review. Integer values from 256 to 65535: Specification Required. Integer values greater than 65535: Expert Review. Strings of length 1: Standards Action With Expert Review. Strings of length 2: Specification Required. Strings of length greater than 2: Expert Review. (Expert: Francesca Palombini, Carsten Bormann)
COSE Key Type Parameters	RFC 9053 Expert Review (Expert: Göran Selander, Derek Atkins, Sean Turner)
COSE Key Types	RFC 9053 Expert Review (Expert: Göran Selander, Derek Atkins, Sean Turner)
CBOR Web Token (CWT) Claims
CBOR Web Token (CWT) Claims	RFC 8392 Integer values from -256 to 255: Standards Action. Integer values from -65536 to -257: Specification Required. Integer values from 256 to 65535: Specification Required. Integer values greater than 65535: Expert Review. Strings of length 1: Standards Action. Strings of length 2: Specification Required. Strings of length greater than 2: Expert Review. (Expert: Mike Jones, Hannes Tschofenig, Ludwig Seitz)
CWT Confirmation Methods	RFC 8747 Specification Required (Expert: Ludwig Seitz, Mike Jones)
Centralized Conferencing Manipulation Protocol (CCMP) Parameters
CCMP Message Types	RFC 6503 Specification Required (Expert: Unassigned)
CCMP Response Codes	RFC 6503 Specification Required (Expert: Unassigned)
CERT RR Certificate Types
CERT RR Certificate Types	RFC 4398 0x0000-0x00FF: Standards Action. 0xFF00-0xFFFF: Standards Action. 0x0100-0xFEFF: IETF Review.
Certificate Management Protocol (CMP)
CMP Well-Known URI Path Segments	Internet Draft draft-ietf-lamps-rfc6712bis-10 Specification Required (Expert: Hendrik Brockhaus, David von Oheimb, John Gray)
Channel-Binding Types
Channel-Binding Types	RFC 5056 Expert Review (Expert: Nicolas Williams)
Character Sets
Character Set Registrations	RFC 2978 Expert Review (Expert: Martin Dürst)
Character Sets	RFC 2978 Expert Review (Expert: Martin Dürst)
Character Sets Mailing List Information	RFC 2978 Expert Review
Cisco Service Level Assurance Protocol
Cisco SLA Protocol Address Family Registry	RFC 6812 Specification Required (Expert: Unassigned)
Cisco SLA Protocol Authenticator Modes Registry	RFC 6812 RFC Required
Cisco SLA Protocol CSLD Command Registry	RFC 6812 RFC Required
Cisco SLA Protocol Measurement-Type Registry	RFC 6812 RFC Required
Cisco SLA Protocol Roles Registry	RFC 6812 RFC Required
Cisco SLA Protocol Status Types Registry	RFC 6812 First Come First Served
Cisco SLA Protocol Version Number Registry	RFC 6812 RFC Required
CoAP-EAP Protocol
CoAP-EAP Cipher Suites	Internet Draft draft-ietf-ace-wg-coap-eap-14 -65536..-25: Specification Required. -24..-21: Private Use. -20..23: Standards Action with Expert Review. 24..65535: Specification Required. (Expert: Unassigned)
CoAP-EAP Information Elements	Internet Draft draft-ietf-ace-wg-coap-eap-14 0-23: Standards Action with Expert Review. 24-49: Private Use. 50-65000: Specification Required. 65001-65535: Experimental Use. (Expert: Unassigned)
Common Architecture Label IPv6 Security Option (CALIPSO)
CALIPSO Domain of Interpretation (DOI)	RFC 5570 1:0:0:0 - 254:255:255:255: Expert Review. 255:0:0:0 - 255:255:255:255: IESG Approval. (Expert: Unassigned)
Common Name Resolution Protocol (CNRP) Parameters
Properties	RFC 3367 First Come First Served
Property Types	RFC 3367 First Come First Served
Status Messages	RFC 3367 First Come First Served
Common Open Policy Service (COPS) Protocol
A-types	RFC 3182 0-127: IETF Review. 128-255: Private Use.
ADMISSION_PRI (P-Type 0x05) Error Codes	RFC 6401 0-127: IETF Review. 128-240: First Come First Served.
C-Num and C-Type Values	RFC 2748 IETF Review
Client Types Values	RFC 2748
Client-type = 0 Flags and Error-SubCodes	RFC 4261 IETF Review
COPS-PR Object S-Num, S-Types, and Error-Codes	RFC 3084 IETF Review
M-Types, Reason Sub-Codes, and Error Sub-codes	RFC 2748 Values are assigned relative to the respective Client-type
Merge Strategies	RFC 6401 0-127: IETF Review. 128-240: First Come First Served.
P-types	RFC 2750 0-49151: IETF Review. 49152-53247: First Come First Served. 53248-65535: Reserved for Private Use.
R-Types, Reason-Codes, Report-Types, Decision Object Command-Codes/Flags, and Error-Codes	RFC 2748 IETF Review
Receiver Proxy Control Policy Element (P-Type 0x07) Control-Value field	RFC 5946 0-127: IETF Review. 128-240: First Come First Served.
Common Presence and Instant Messaging (CPIM) Headers
CPIM Headers	RFC 3862 Standards Action
Concise Binary Object Representation (CBOR)
CBOR Simple Values	RFC 8949 0-19: Standards Action. 32-255: Specification Required. (Expert: Carsten Bormann)
CBOR Tags	RFC 8949 0-23: Standards Action. 24-32767: Specification Required. 32768-18446744073709551615: First Come First Served. (Expert: Christian Amsüss, Thomas Fossati, Francesca Palombini, Carsten Bormann (backup))
Time Tag Map Keys	RFC 9581 Specification Required (Expert: Henk Birkholz, Esko Dijk)
Timescales	RFC 9581 RFC and Expert Review Required (Expert: Henk Birkholz, Esko Dijk)
Concise Data Definition Language (CDDL)
CDDL Control Operators	RFC 8610 name includes internal dot: IETF Review. name does not include internal dot: Specification Required. (Expert: Jeffrey Yasskin, Henk Birkholz)
Concise Software Identifier (CoSWID)
CoSWID Items	RFC 9393 0-32767: Standards Action with Expert Review. 32768-4294967295: Specification Required. (Expert: Charles Schmidt, Jessica Fitzgerald-McKay, Henk Birkholz)
Connectivity Fault Management (CFM) OAM IETF Parameters
CFM OAM IETF OpCodes	RFC 7319 Standards Action
CFM OAM IETF TLV Types	RFC 7319 Standards Action
Constrained RESTful Environments (CoRE) Parameters
CoAP Codes	RFC 7252 Reserved ranges may be allocated in accordance with section 4.3 ofRFC 8126.
CoAP Content-Formats	RFC 7252 0-255: Expert Review. 256-9999: IETF Review or IESG Approval. 10000-64999: First Come First Served. 65000-65535: Experimental use (no operational use). (Expert: Esko Dijk (primary), Klaus Hartke (secondary), Carsten Bormann (secondary), Jaime Jimenez (secondary), Alexander Pelov (secondary))
CoAP Option Numbers	RFC 7252 0-255: IETF Review or IESG Approval. 256-2047: Specification Required. 2048-64999: Expert Review. 65000-65535: Experimental use (no operational use). (Expert: Bilhanan Silverajan (primary), Klaus Hartke (secondary), Carsten Bormann (secondary), Jaime Jimenez (secondary), Alexander Pelov (secondary))
CoAP Signaling Codes	RFC 8323 IETF Review or IESG Approval
CoAP Signaling Option Numbers	RFC 8323 0-255: IETF Review or IESG Approval. 256-2047: Specification Required. 2048-64999: Expert Review. 65000-65535: Experimental use (no operational use). (Expert: Bilhanan Silverajan (primary), Klaus Hartke (secondary), Alexander Pelov (secondary))
Custom Problem Detail Keys	RFC 9290 Expert Review (Expert: Thomas Fossati, Carsten Bormann)
Endpoint Type (et=) RD Parameter Values	RFC 9176 value starts with "core": IETF Review. all other values: Specification Required. (Expert: Carsten Bormann, Jaime Jiménez, Christian Amsüss)
Interface Description (if=) Link Target Attribute Values	RFC 6690 value starts with "core": IETF Review. all other values: Specification Required. (Expert: Carsten Bormann, Jaime Jimenez, Christian Amsüss)
OSCORE Flag Bits	RFC 8613 Expert Review (Expert: Francesca Palombini, Göran Selander, Christian Amsüss)
RD Parameters	RFC 9176 Expert Review (Expert: Carsten Bormann, Jaime Jiménez, Christian Amsüss)
Resource Type (rt=) Link Target Attribute Values	RFC 6690 value starts with "core": IETF Review. all other values: Specification Required. (Expert: Carsten Bormann, Jaime Jimenez, Christian Amsüss)
Standard Problem Detail Keys	RFC 9290 Specification Required (Expert: Thomas Fossati, Carsten Bormann)
Target Attributes	RFC 9423 Expert Review (Expert: Carsten Bormann, Marco Tiloca)
Content Delivery Network Interconnection (CDNI) Parameters
CDNI Capabilities Redirection Modes	RFC 8008 IETF Review
CDNI Capacity Limit Types	Internet Draft draft-ietf-cdni-capacity-insights-extensions-12 Specification Required (Expert: Unassigned)
CDNI CI/T Error Codes	RFC 8007 Specification Required (Expert: Kevin Ma, Ben Niven-Jenkins)
CDNI CI/T Trigger Types	RFC 8007 RFC Required
CDNI Logging Directive Names	RFC 7937 Specification Required (Expert: Kevin Ma)
CDNI Logging Field Names	RFC 7937 Specification Required (Expert: Kevin Ma)
CDNI Logging File version	RFC 7937 Specification Required (Expert: Kevin Ma)
CDNI Logging record-types	RFC 7937 Specification Required (Expert: Kevin Ma)
CDNI Metadata Footprint Types	RFC 8006 Specification Required (Expert: Kevin Ma)
CDNI Metadata Protocol Types	RFC 8006 Specification Required (Expert: Kevin Ma)
CDNI Payload Types	RFC 7736 Specification Required (Expert: Kevin Ma, Ben Niven-Jenkins)
CDNI RI Error response code	RFC 7975 Specification Required (Expert: Kevin Ma, Ben Niven-Jenkins)
CDNI Telemetry Source Types	Internet Draft draft-ietf-cdni-capacity-insights-extensions-12 Specification Required (Expert: Unassigned)
CDNI URI Signing Signed Token Transport	RFC 9246 Specification Required (Expert: Phil Sorber)
CDNI URI Signing Verification Codes	RFC 9246 Specification Required (Expert: Phil Sorber)
Content Disposition Values and Parameters
Content Disposition Parameters	RFC 2183 First Come First Served
Content Disposition Values	RFC 2183 Standards Track or IESG-Approved Experimental RFC
Handling Parameter Values	RFC 3204 Not Defined
Voice Parameter Values	RFC 2421 Not Defined
Content Security Policy Directives
Content Security Policy Directives	RFC 7762 Specification Required (Expert: Mike West)
Content-Centric Networking (CCNx)
CCNx Echo Reply Codes	RFC 9508 Specification Required (Expert: Dave Oran, Hitoshi Asaeda)
CCNx Hash Function Types	RFC 8609 Specification Required (Expert: Dave Oran, Hitoshi Asaeda)
CCNx Hop-by-Hop Types	RFC 8609 RFC Required
CCNx Interest Return Code Types	RFC 8609 Specification Required (Expert: Dave Oran, Hitoshi Asaeda)
CCNx Message Types	RFC 8609 RFC Required
CCNx Name Segment Types	RFC 8609 Specification Required (Expert: Dave Oran, Hitoshi Asaeda)
CCNx Packet Types	RFC 8609 RFC Required
CCNx Payload Types	RFC 8609 Specification Required (Expert: Dave Oran, Hitoshi Asaeda)
CCNx Reply Types	RFC 9344 RFC Required
CCNx Top-Level Types	RFC 8609 RFC Required
CCNx Validation Algorithm Types	RFC 8609 Specification Required (Expert: Dave Oran, Hitoshi Asaeda)
CCNx Validation-Dependent Data Types	RFC 8609 RFC Required
Context labels for Internet Messages
Internet Message Content Types	RFC 3458 RFC Required
Context Transfer Protocol (CXTP) Parameters
Context Transfer Profile Type Registry	RFC 4065 Expert Review (Expert: Unassigned)
Context Transfer Protocol Authorization Token Calculation Algorithms	RFC 4065 Expert Review (Expert: Unassigned)
Control And Provisioning of Wireless Access Points (CAPWAP) Parameters
AC DTLS Policy	RFC 5415 Standards Action
AC Information Type	RFC 5415 Expert Review (Expert: Margaret Cullen)
AC Security Types	RFC 5415 Standards Action
Alternate Tunnel Sub-elements	RFC 8350 Expert Review (Expert: Sri Gundavelli, Li Xue)
Alternate Tunnel-Types	RFC 8350 Specification Required (Expert: Sri Gundavelli, Li Xue)
CAPWAP Control Message Flags	RFC 5415 Expert Review (Expert: Margaret Cullen)
CAPWAP Header Flags	RFC 5415 Expert Review (Expert: Margaret Cullen)
CAPWAP IEEE 802.11 Message Types	RFC 5416 Expert Review (Expert: Margaret Cullen)
CAPWAP Message Element Type	RFC 5415 Expert Review (Expert: Margaret Cullen)
CAPWAP Message Types	RFC 5415 Expert Review (Expert: Margaret Cullen)
CAPWAP Transport Protocol Types	RFC 5415 Expert Review (Expert: Margaret Cullen)
CAPWAP Wireless Binding Identifier	RFC 5415 Expert Review (Expert: Margaret Cullen)
Data Transfer Mode	RFC 5415 Expert Review (Expert: Margaret Cullen)
Data Transfer Type	RFC 5415 Expert Review (Expert: Margaret Cullen)
Discovery Types	RFC 5415 Expert Review (Expert: Margaret Cullen)
ECN Support	RFC 5415 Expert Review (Expert: Margaret Cullen)
IEEE 802.11 Antenna Combiner	RFC 5416 Expert Review (Expert: Margaret Cullen)
IEEE 802.11 Antenna Selection	RFC 5416 Expert Review (Expert: Margaret Cullen)
IEEE 802.11 Auth Type	RFC 5416 Expert Review (Expert: Margaret Cullen)
IEEE 802.11 Encryption Capabilities	RFC 5416 Expert Review (Expert: Margaret Cullen)
IEEE 802.11 Key Status	RFC 5416 Expert Review (Expert: Margaret Cullen)
IEEE 802.11 QoS	RFC 5416 Expert Review (Expert: Margaret Cullen)
IEEE 802.11 Session Key Flags	RFC 5416 Expert Review (Expert: Margaret Cullen)
IEEE 802.11 Split MAC Profile	RFC 7494 Expert Review (Expert: Unassigned)
IEEE 802.11 Tagging Policy	RFC 5416 Expert Review (Expert: Margaret Cullen)
IEEE 802.11 WTP Radio Fail	RFC 5416 Expert Review (Expert: Margaret Cullen)
IEEE 802.11 WTP Radio Type	RFC 5416 Expert Review (Expert: Margaret Cullen)
Radio Admin State	RFC 5415 Expert Review (Expert: Margaret Cullen)
Radio Failure Causes	RFC 5415 Expert Review (Expert: Margaret Cullen)
Radio Operational State	RFC 5415 Expert Review (Expert: Margaret Cullen)
Result Code	RFC 5415 Expert Review (Expert: Margaret Cullen)
Returned Message Element Reason	RFC 5415 Expert Review (Expert: Margaret Cullen)
WTP Board Data Type	RFC 5415 Expert Review (Expert: Margaret Cullen)
WTP Descriptor Type	RFC 5415 Expert Review (Expert: Margaret Cullen)
WTP Fallback Mode	RFC 5415 Expert Review (Expert: Margaret Cullen)
WTP Frame Tunnel Mode	RFC 5415 Expert Review (Expert: Margaret Cullen)
WTP MAC Type	RFC 5415 Expert Review (Expert: Margaret Cullen)
WTP Radio Stats Failure Type	RFC 5415 Expert Review (Expert: Margaret Cullen)
WTP Reboot Stats Failure Type	RFC 5415 Expert Review (Expert: Margaret Cullen)
ControLling mUltiple streams for tElepresence (CLUE)
CLUE Message Types	RFC 8847 Specification Required (Expert: Roni Even, Simon Pietro Romano)
CLUE Response Codes	RFC 8847 Specification Required (Expert: Roni Even, Simon Pietro Romano)
CLUE Schema <personType>	RFC 8846 Expert Review (Expert: Roni Even, Simon Pietro Romano)
CLUE Schema <presentation>	RFC 8846 Expert Review (Expert: Roni Even, Simon Pietro Romano)
CLUE Schema <sensitivityPattern>	RFC 8846 Expert Review (Expert: Roni Even, Simon Pietro Romano)
CLUE Schema <view>	RFC 8846 Expert Review (Expert: Roni Even, Simon Pietro Romano)
Cryptographic Suites for IKEv1, IKEv2, and IPsec
Cryptographic Suites for IKEv1, IKEv2, and IPsec	RFC 4308 Expert Review and RFC Required (Expert: Tero Kivinen)
Cryptographically Generated Addresses (CGA) Message Type Name Space
CGA Extension Type Tags	RFC 3972,RFC 9374 First Come First Served
CGA Extension Type Values	RFC 4581 Standards Action
CGA SEC	RFC 4982 Standards Action
D
Data Channel Establishment Protocol (DCEP) Parameters
Channel Types	RFC 8832 RFC Required
Message Types	RFC 8832 RFC Required
Data Link Switching Client Access Protocol (DCAP) Parameters
Data Link Switching Protocol Frame Codes	RFC 2114 RFC Required
Data Link Switching Protocol Sender Capability Codes	RFC 2114 RFC Required
Data Structure for the Security Suitability of Cryptographic Algorithms (DSSC)
Cryptographic Algorithms	RFC 5698 First Come First Served
Parameter Definitions	RFC 5698 RFC Required
Datagram Congestion Control Protocol (DCCP) Parameters
Ack Vector States	RFC 4340 Standards Action
CCID2-specific Feature Numbers (128-255)	RFC 4341 Standards Action
CCID2-specific Option Types (128-255)	RFC 4341 Standards Action
CCID2-specific Reset codes (128-255)	RFC 4341 Standards Action
CCID3-specific Feature Numbers (128-255)	RFC 4342 Standards Action
CCID3-specific Option Types (128-255)	RFC 4342 Standards Action
CCID3-specific Reset codes (128-255)	RFC 4342 Standards Action
CCID4-specific Feature Numbers (128-255)	RFC 5622 Standards Action
CCID4-specific Option Types (128-255)	RFC 5622 Standards Action
CCID4-specific Reset codes (128-255)	RFC 5622 Standards Action
Congestion Control Identifiers	RFC 4340 0-1: IETF Review (IETF RFC publication). 4-247: IETF Review (IETF RFC publication). 248-254: Reserved. 255: IETF Review (IETF RFC publication).
Drop Codes	RFC 4340 Standards Action
Feature Numbers	RFC 4340 10-119: IETF Review (IETF RFC publication). 120-126: Reserved. 127: IETF Review (IETF RFC publication). 128-255: CCID-specific codes.
Option Types	RFC 4340 3-30: IETF Review (IETF RFC publication). 45-119: IETF Review (IETF RFC publication). 120-126: Reserved. 127: IETF Review (IETF RFC publication). 128-255: CCID-specific codes.
Packet Types	RFC 4340 Standards Action
Reset Codes	RFC 4340 12-119: IETF Review (IETF RFC publication). 120-126: Reserved. 127: IETF Review (IETF RFC publication). 128-255: CCID-specific codes.
Service Codes	RFC 4340 Specification Required or First Come First Served (Expert: Eddie Kohler)
Datagram Transport Layer Security (DTLS) Extension to Establish Keys for Secure Real-time Transport Protocol (SRTP)
DTLS-SRTP Protection Profiles	RFC 5764 Specification Required (Expert: Unassigned)
Delivery Status Notification (DSN) Types
Address Types	RFC 3461,RFC 3464 RFC Required
Diagnostic Types	RFC 3461,RFC 3464 RFC Required
MTA Name Types	RFC 3461,RFC 3464 RFC Required
DetNet Associated Channel Header (d-ACH) Flags
DetNet Associated Channel Header (d-ACH) Flags	RFC 9546 IETF Review
Device Identification
DEV URN Subtypes	RFC 9039 Specification Required or IESG Approval (Expert: Jari Arkko, Jaime Jimenez)
Differentiated Services Field Codepoints (DSCP)
Differentiated Services Field Codepoints (DSCP)	RFC 2474,RFC 3260
ECN Field (Bits 6-7)	RFC 3168 RFC Required
Directory System Names
Distinguished Names	RFC 1779 Closed seeRFC 4520
Distributed Denial-of-Service Open Threat Signaling (DOTS) Signal Channel
DOTS Signal Channel Attack Status Codes	RFC 9132 Standards Action
DOTS Signal Channel CBOR Key Values	RFC 9132 1-127: IETF Review. 128-255: IETF Review. 256-16383: IETF Review. 16384-32767: Specification Required. 32768-49151: IETF Review. 49152-65535: Private Use. (Expert: Nik Teague, Mohamed Boucadair, Andrew Mortensen, Tirumaleswar Reddy)
DOTS Signal Channel Conflict Cause Codes	RFC 9132 Standards Action
DOTS Signal Channel Conflict Status Codes	RFC 9132 Standards Action
DOTS Signal Channel Status Codes	RFC 9132 Standards Action
Distributed Node Consensus Protocol (DNCP)
DNCP TLV Types	RFC 7787 Standards Action
HNCP TLV Types	RFC 7788 RFC Required
DNS-Based Authentication of Named Entities (DANE) Parameters
TLSA Certificate Usages	RFC 6698,RFC 7218 RFC Required
TLSA Matching Types	RFC 6698,RFC 7218 Specification Required (Expert: Unassigned)
TLSA Selectors	RFC 6698,RFC 7218 Specification Required (Expert: Unassigned)
Domain Name System (DNS) Parameters
AFSDB RR Subtype	RFC 6895,RFC 1035 Registry closed perRFC 6895
AMTRELAY Relay Type Field	RFC 8777 Specification Required (Expert: Unassigned)
Child Synchronization (CSYNC) Flags	RFC 7477 Standards Action
DHCID RR Digest Type Codes	RFC 4701 Standards Action
DHCID RR Identifier Type Codes	RFC 4701 Standards Action (Expert: Ólafur Guðmundsson)
DNS Catalog Zones Properties	RFC 9432 property prefix ends in the label "ext": Private Use. all other property prefixes: Expert Review. (Expert: Peter Thomassen, Ondřej Surý, Willem Toorop)
DNS CLASSes	RFC 6895,RFC 9108 0: Standards Action. 1-127: IETF Review. 128-253: IETF Review. 256-32767: IETF Review. 32768-57343: Specification Required. 57344-65279: Specification Required. 65280-65534: Private Use. 65535: Standards Action. (Expert: Petr Špaček, Ladislav Lhotka)
DNS EDNS0 Option Codes (OPT)	RFC 6891 1-65000: Expert Review. 65001-65534: Local/Experimental Use. (Expert: Ólafur Guðmundsson (primary), Frederico AC Neves (secondary), Ray Bellis (secondary), Roy Arends (secondary))
DNS Header Flags	RFC 6895,RFC 1035 Standards Action
DNS KEY RR Protocol Octet Values	RFC 4034,RFC 2535 CLOSED perRFC 3445
DNS Label Types	RFC 6891 Standards Action
DNS OpCodes	RFC 6895,RFC 1035 Standards Action
DNS RCODEs	RFC 6895,RFC 1035 0-3840: IETF Review. 3841-4095: Private Use. 4096-65534: IETF Review. 65535: Reserved (Standards Action).
DNS Resolver Information Keys	RFC 9606 Specification Required (Expert: Tirumal Reddy, Mohamed Boucadair, Ben Schwartz)
DNS Server Cookie Methods	RFC 9018,RFC 7873 Version 1-239, Size 8-32: Expert Review. Version 240-254, Size 8-32: Private Use. (Expert: Ondřej Surý, Donald Eastlake)
DNS SVCB Service Parameter Keys (SvcParamKeys)	RFC 9460 0-65279: Expert Review. 65280-65534: Private Use. (Expert: Benjamin Schwartz, David Lawrence)
DNS-over-QUIC Error Codes	RFC 9250 provisional (greater than 0x3f): Expert Review. provisional registration Date field update: First Come First Served. permanent, 0x00-0x3f: Standards Action or IESG Approval. permanent, greater than 0x3f: Specification Required. (Expert: Sara Dickinson, Christian Huitema)
DNSKEY RR Flags	RFC 3755,RFC 4034 Standards Action
DSO Type Codes	RFC 8490 0x0004-0x003F: Standards Action. 0x0040-0xF7FF: Expert Review. 0xF800-0xFBFF: Experimental/Local Use. 0xFC00-0xFFFF: Standards Action. (Expert: Ted Lemon, Sara Dickinson, John Dickinson)
DSYNC: Location of Synchronization Endpoints	Internet Draft draft-ietf-dnsop-generalized-notify-09 Expert Review (Expert: Unassigned)
EDNS Header Flags (16 bits)	RFC 6891 Standards Action
EDNS version Number (8 bits)	RFC 6891 Standards Action
Extended DNS Error Codes	RFC 8914 0-49151: First Come First Served. 49152-65535: Private Use.
Resource Record (RR) TYPEs	RFC 6895,RFC 1035,RFC 9108 0: RRTYPE zero is used as a special indicator for the SIG RRRFC 2931,RFC 4034 and in other circumstances and must neverbe allocated for ordinary use.. 1-127: Expert Review (see mailing list information inRFC 6895) or Standards Action. 128-255: Expert Review (see mailing list information inRFC 6895) or Standards Action. 256-61439: Expert Review (see mailing list information inRFC 6895) or Standards Action. 61440-65279: Reserved for future use (IETF Review required to define use). 65280-65534: Private Use. 65535: Reserved (Standards Action). (Expert: Roy Arends, Frederico AC Neves, Ólafur Guðmundsson, Ray Bellis)
SSHFP RR types for fingerprint types	RFC 4255 IETF Review
SSHFP RR Types for public key algorithms	RFC 4255 IETF Review
Underscored and Globally Scoped DNS Node Names	RFC 8552 Expert Review (Expert: Frederico A C Neves, Paul Wouters)
ZONEMD Hash Algorithms	RFC 8976 1-239: Specification Required. 240-254: Private Use. (Expert: Warren Kumari, Duane Wessels, Wes Hardaker)
ZONEMD Schemes	RFC 8976 1-239: Specification Required. 240-254: Private Use. (Expert: Warren Kumari, Duane Wessels, Wes Hardaker)
ZONEVERSION TYPE Values	RFC 9660 0-245: Specification Required. 246-254: Private Use. 255: Reserved. (Expert: Hugo Salgado, Mauricio Vergara Ereche, Duane Wessels)
Domain Name System Security (DNSSEC) Algorithm Numbers
Digest Algorithms	RFC 3658,RFC 4034,RFC 4035,RFC 9157 RFC Required
DNS KEY Record Diffie-Hellman Prime Lengths	RFC 2539 IETF Review
DNS KEY Record Diffie-Hellman Well-Known Prime/Generator Pairs	RFC 2539 0x0000-0x07ff: Standards Action. 0x0800-0xbfff: RFC Required.
DNS Security Algorithm Numbers	RFC 4034,RFC 3755,RFC 6014,RFC 6944 RFC Required
Domain Name System Security (DNSSEC) NextSECure3 (NSEC3) Parameters
DNSSEC NSEC3 Flags	RFC 5155,RFC 9157 RFC Required
DNSSEC NSEC3 Hash Algorithms	RFC 5155,RFC 9157 RFC Required
DNSSEC NSEC3PARAM Flags	RFC 5155,RFC 9157 RFC Required
Domain-based Message Authentication, Reporting, and Conformance (DMARC)
DMARC Report Formats	Internet Draft draft-ietf-dmarc-dmarcbis-40 Specification Required (Expert: Scott Kitterman)
DMARC Tags	Internet Draft draft-ietf-dmarc-dmarcbis-40 Specification Required (Expert: Scott Kitterman)
DomainKeys Identified Mail (DKIM) Parameters
_domainkey DNS TXT Record Tag Specifications	RFC 6376 IETF Review
Authorized Third-Party Signature (ATPS) Tag Registry	RFC 6541 Specification Required (Expert: Unassigned)
DKIM Hash Algorithms	RFC 6376 IETF Review
DKIM Key Type	RFC 6376 IETF Review
DKIM Reporting Tag Registry	RFC 6651 Specification Required (Expert: Unassigned)
DKIM Selector Flags	RFC 6376 IETF Review
DKIM Service Types	RFC 6376 IETF Review
DKIM Signature Tag Specifications	RFC 6376 IETF Review
DKIM-Signature Canonicalization Body	RFC 6376 IETF Review
DKIM-Signature Canonicalization Header	RFC 6376 IETF Review
DKIM-Signature Query Method	RFC 6376 IETF Review
Drone Remote ID Protocol
DRIP Frame Types	RFC 9575 0x01-0x9F: Expert Review. 0xA0-0xEF: First Come First Served. 0xF0-0xFF: Experimental Use. (Expert: Adam Wiethuechter, Mohamed Boucadair)
DRIP SAM Types	RFC 9575 Standards Action
Hierarchical a HIT (HHIT) Suite IDs	RFC 9374 IETF Review
Hierarchical HIT (HHIT) Prefixes	RFC 9374 Expert Review (Expert: Adam Wiethuechter, Mohamed Boucadair)
Dynamic Host Configuration Protocol (DHCP) and Bootstrap Protocol (BOOTP) Parameters
Altitude Type Registry	RFC 6225 Standards Action
Authentication Suboption (value 8) - Algorithm identifier values	RFC 4030 IETF Review
Authentication Suboption (value 8) - Protocol identifier values	RFC 3118 IETF Review
Authentication Suboption (value 8) - Replay Detection Method (RDM) identifier values	RFC 4030 IETF Review
BOOTP Vendor Extensions and DHCP Options	RFC 2939 IETF Review
CableLabs Client Configuration Option Ticket Control Mask Bit Definitions	RFC 3594 IETF Review
Datum Registry	RFC 6225 Standards Action
DHCP Cablelabs Client Configuration Option Type 122 Sub-Option Codes	RFC 3495 IETF Review
DHCP Message Type 53 Values	RFC 2939 IETF Review
DHCP Options Permitted in the RADIUS DHCPv4-Options Attribute	RFC 9445 Expert Review (Expert: Alan DeKok, Mohamed Boucadair)
DHCP Relay Agent Sub-Option Codes	RFC 3046 IETF Review
DHCP State Type 156 Values	RFC 6926 IETF Review
DHCP Status Code Type 151 Values	RFC 6926 IETF Review
GeoLoc Option Version Registry	RFC 6225 Standards Action
IEEE 802.21 Service Type (MoS DHCPv4 Address and FQDN Sub-Options)	RFC 5678 Standards Action
NetWare/IP Option Type 63 Sub-Option Codes	RFC 2242 Not defined
NTP Time Source Suboptions	RFC 5908 IETF Review
RADIUS Attributes Permitted in RADIUS Attributes DHCP Suboption	RFC 9445 Expert Review (Expert: Alan DeKok, Mohamed Boucadair)
VSS Type Options	RFC 6607 IETF Review
Dynamic Host Configuration Protocol for IPv6 (DHCPv6)
DHCPv6 Options Permitted in the RADIUS DHCPv6-Options Attribute	RFC 9445 Expert Review (Expert: Alan DeKok, Mohamed Boucadair)
DUIDs	RFC 8415 Standards Action
IEEE 802.21 Service Type (MoS DHCPv6 Address and FQDN Sub-Options)	RFC 5678 Standards Action
Message Types	RFC 8415 Standards Action
NTP Time Source Suboptions	RFC 5908 IETF Review
Option Codes	RFC 8415 Expert Review and Standards Action (Expert: Ted Lemon, Bernie Volz, Tomek Mrugalski)
Option Codes Permitted in the S46 Priority Option	RFC 8026 IETF Review
OPTION_LQ_QUERY option	RFC 5007 Standards Action
Options Permitted in the Relay-Supplied Options Option	RFC 6422 IETF Review
Processor Architecture Types	RFC 5970 Expert Review (Expert: Vincent Zimmer, Bernie Volz, Tomek Mrugalski)
RADIUS Attributes Permitted in DHCPv6 RADIUS Option	RFC 7037 Expert Review (Expert: Bernie Volz, Tomek Mrugalski)
Status Codes	RFC 8415 Standards Action
Supported Transport	RFC 9527 RFC Required
VSS Type Options	RFC 6607 IETF Review
Dynamic Link Exchange Protocol (DLEP) Parameters
Data Item Type Values	RFC 8175 26-65407: Specification Required. 65408-65534: Private Use. (Expert: Rick Taylor)
Extension Type Values	RFC 8175 2-65519: Specification Required. 65520-65534: Private Use. (Expert: Rick Taylor)
Hop Control Actions Values	RFC 8629 4-65519: Specification Required. 65520-65534: Private Use. (Expert: Rick Taylor)
IPv4 Address Flags	RFC 8175 Specification Required (Expert: Rick Taylor)
IPv4 Attached Subnet Flags	RFC 8175 Specification Required (Expert: Rick Taylor)
IPv4 Connection Point Flags	RFC 8175 Specification Required (Expert: Rick Taylor)
IPv6 Address Flags	RFC 8175 Specification Required (Expert: Rick Taylor)
IPv6 Attached Subnet Flags	RFC 8175 Specification Required (Expert: Rick Taylor)
IPv6 Connection Point Flags	RFC 8175 Specification Required (Expert: Rick Taylor)
Message Type Values	RFC 8175 17-65519: Specification Required. 65520-65534: Private Use. (Expert: Rick Taylor)
Peer Type Flags	RFC 8175 Specification Required (Expert: Rick Taylor)
Queue Parameter Sub-Data Item Type Values	RFC 8651 2-65407: Specification Required. 65408-65534: Private Use. (Expert: Unassigned)
Signal Type Values	RFC 8175 3-65519: Specification Required. 65520-65534: Private Use. (Expert: Rick Taylor)
Status Code Values	RFC 8175 4-111: Specification Required. 112-127: Private Use. 133-239: Specification Required. 240-254: Private Use. (Expert: Rick Taylor)
Dynamic Source Routing (DSR) Protocol Parameters
Dynamic Source Routing (DSR) Protocol Options	RFC 4728 Expert Review (Expert: David B. Johnson, David A. Maltz, Yih-Chun Hu)
Dynamic Source Routing (DSR) Protocol Route Error Types	RFC 4728 Expert Review (Expert: David B. Johnson, David A. Maltz, Yih-Chun Hu)
Dynamic Symmetric Key Provisioning Protocol (DSKPP)
DSKPP Version Registry	RFC 6063 Standards Action
Key Container Registry	RFC 6063 Specification Required (Expert: Unassigned)
PRF Algorithm ID Registry	RFC 6063 Specification Required (Expert: Unassigned)
Status Codes	RFC 6063 Specification Required (Expert: Unassigned)
E
EAP-pwd Parameters
Password Preprocessing Methods	RFC 5931 Specification Required (Expert: Joseph Salowey)
PRF Registry	RFC 5931 IETF Review
PWD-Exch Messages	RFC 5931 IETF Review
Random Function Registry	RFC 5931 Specification Required (Expert: Joseph Salowey)
Electronic Commerce Modeling Language (ECML) Parameters
URN Prefix: urn:ietf:params:ecml	RFC 4112 IESG Approval
Electronic Commerce Modeling Language Version 2 (ECMLv2) Parameters
Ecom_Payment_Card_Protocol Registry	RFC 4112 Expert Approval (Expert: Donald Eastlake)
Ecom_Payment_Card_Type Registry	RFC 4112 Expert Approval (Expert: Donald Eastlake)
Ecom_Transaction_Type Registry	RFC 4112 Expert Approval (Expert: Donald Eastlake)
Email Authentication Parameters
Email Authentication Methods	RFC 8601 Expert Review (Expert: Murray Kucherawy (primary), Scott Kitterman (secondary))
Email Authentication Property Types	RFC 8601 Expert Review (Expert: Murray Kucherawy (primary), Scott Kitterman (secondary))
Email Authentication Result Names	RFC 8601 Expert Review (Expert: Murray Kucherawy (primary), Scott Kitterman (secondary))
Emergency Call Additional Data
Device Classification	RFC 7852 Expert Review (Expert: Brian Rosen)
Device ID Type	RFC 7852 Expert Review (Expert: Brian Rosen)
Device/Service Data Type	RFC 7852 Specification Required (Expert: Brian Rosen)
Emergency Call Data Types	RFC 7852 Specification Required (Expert: Brian Rosen (primary), Henning Schulzrinne (secondary))
Provider ID Series	RFC 7852 Expert Review (Expert: Brian Rosen)
Service Environment	RFC 7852 Expert Review (Expert: Brian Rosen)
Service Mobility	RFC 7852 Expert Review (Expert: Brian Rosen)
Service Type	RFC 7852 Expert Review (Expert: Brian Rosen)
Type of Provider	RFC 7852 Expert Review (Expert: Brian Rosen)
Emergency Call Metadata/Control Data
Emergency Call Action Failure Reasons	RFC 8147 Expert Review (Expert: Randall Gellens)
Emergency Call Actions	RFC 8147 Expert Review (Expert: Randall Gellens)
Emergency Call Static Messages	RFC 8148 Specification Required (Expert: Randall Gellens)
Emergency Call Vehicle Camera IDs	RFC 8148 Expert Review (Expert: Randall Gellens)
Emergency Call Vehicle Lamp IDs	RFC 8148 Expert Review (Expert: Randall Gellens)
Enumservice Registrations
Enumservice Registrations	RFC 6117 Specification Required (Expert: Bernie Hoeneisen)
Ephemeral Diffie-Hellman Over COSE (EDHOC)
EDHOC Authentication Credential Types	RFC 9668 less than -65536: Private Use. -65536 to -25: Specification Required. -24 to 23: Standards Action with Expert Review. 24 to 65535: Specification Required. greater than 65535: Private Use. (Expert: Francesca Palombini, Marco Tiloca, Göran Selander)
EDHOC Cipher Suites	RFC 9528 -65536 to -25: Specification Required. -24 to -21: Private Use. -20 to 23: Standards Action with Expert Review. 24 to 65535: Specification Required. (Expert: John Mattson, Göran Selander, Mališa Vučinić)
EDHOC Error Codes	RFC 9528 -65536 to -25: Expert Review. -24 to 23: Standards Action. 24 to 65535: Expert Review. (Expert: John Mattson, Göran Selander, Mališa Vučinić)
EDHOC Exporter Labels	RFC 9528 0-23: Standards Action. 24-32767: Expert Review. 32768-65535: Private Use. (Expert: John Mattson, Göran Selander, Mališa Vučinić)
EDHOC External Authorization Data	RFC 9528 0-23: Standards Action with Expert Review. 24-65535: Specification Required. (Expert: John Mattson, Göran Selander, Mališa Vučinić)
EDHOC Method Types	RFC 9528 -65536 to -25: Specification Required. -24 to 23: Standards Action with Expert Review. 24 to 65535: Specification Required. (Expert: John Mattson, Göran Selander, Mališa Vučinić)
ESP AGGFRAG_PAYLOAD
AGGFRAG_PAYLOAD Sub-Types	RFC 9347 Expert Review (Expert: Christian Hopps)
Ethernet VPN (EVPN)
EVPN Route Types	RFC 7432 RFC Required
Extended Master Session Key (EMSK) Parameters
EMSK PRF Numbers	RFC 5295 0-220: IETF Review. 221-255: Reserved for Private Use.
User Specific Root Keys (USRK) Key Labels	RFC 5295 Specification Required (Expert: Unassigned)
Extensible Authentication Protocol (EAP)
ADE Type Namespace	RFC 4746 Expert Review (Expert: Joseph Salowey)
Attribute Types (Non-Skippable Attributes 0-127)	RFC 4187 Specification Required (Expert: Vesa Lehtovirta)
Attribute Types (Skippable Attributes 128-255)	RFC 4187 Specification Required (Expert: Vesa Lehtovirta)
DH Group ID Namespace	RFC 4746 Expert Review (Expert: Unassigned)
EAP Finish/Re-auth Flags	RFC 6630 Standards Action or IESG Approval
EAP Initiate and Finish Attributes	RFC 6696 IETF Review
EAP Initiate/Re-auth Flags	RFC 6630 Standards Action or IESG Approval
EAP Initiate/Re-auth-Start Flags	RFC 6630 Standards Action or IESG Approval
EAP Lower Layers	RFC 6677 Expert Review (Expert: Joseph Salowey)
EAP-AKA' AT_KDF Key Derivation Function Values	RFC 9048 Specification Required (Expert: Vesa Lehtovirta)
EAP-AKA' AT_KDF_FS Key Derivation Function Values	RFC 9678 Specification Required (Expert: Unassigned)
EAP-FAST (value 43) Error-TLV (value 5) Error-Codes
EAP-FAST (value 43) Error-TLV (value 5) Error-Codes	RFC 4851 Specification Required (Expert: Joseph Salowey)
EAP-FAST (value 43) Request-Action TLV (value 19) Action Codes
EAP-FAST (value 43) Request-Action TLV (value 19) Action Codes	RFC 4851 Specification Required (Expert: Joseph Salowey)
EAP-FAST GTC Error Codes	RFC 5421 Specification Required (Expert: Joseph Salowey)
EAP-FAST PAC Attribute Types	RFC 5422 Specification Required (Expert: Joseph Salowey)
EAP-FAST PAC Types	RFC 5422 Specification Required (Expert: Joseph Salowey)
EAP-FAST Server-Trusted-Root Credential Format Types	RFC 5422 Specification Required (Expert: Joseph Salowey)
EAP-FAST TLV Types (Value 43)
EAP-FAST TLV Types (Value 43)	RFC 4851 Specification Required (Expert: Joseph Salowey)
EAP-GPSK Ciphersuites	RFC 5433 IETF Review
EAP-GPSK Failure Codes	RFC 5433 IETF Review
EAP-GPSK OP Codes	RFC 5433 IETF Review
EAP-GPSK Protected Data Payloads	RFC 5433 IETF Review
EAP-IKEv2 Payloads	RFC 5106 Expert Review (Expert: Joseph Salowey)
EAP-NOOB Cryptosuites
EAP-NOOB Cryptosuites	RFC 9140 Specification Required (Expert: Tuomas Aura, Mohit Sethi)
EAP-NOOB Error Codes
EAP-NOOB Error Codes	RFC 9140 6001-6999: Private and Experimental Use. All other values: Specification Required. (Expert: Tuomas Aura, Mohit Sethi)
EAP-NOOB Message Types
EAP-NOOB Message Types	RFC 9140 Specification Required (Expert: Tuomas Aura, Mohit Sethi)
EAP-NOOB PeerInfo Data Fields
EAP-NOOB PeerInfo Data Fields	RFC 9140 Specification Required (Expert: Tuomas Aura, Mohit Sethi)
EAP-NOOB ServerInfo Data Fields
EAP-NOOB ServerInfo Data Fields	RFC 9140 Specification Required (Expert: Tuomas Aura, Mohit Sethi)
EAP-SAKE messages	RFC 4763 IETF Review with Specification Required (Expert: Unassigned)
EAP-TTLS AVP Usage	RFC 5281 IETF Review
Encryption Algorithms	RFC 4793 0x0003-0x7fff: Specification Required and IESG Approval. 0x8000-0xffff: Vendor-specific proprietary algorithms. (Expert: Joseph Salowey)
EXT_Type Numbers	RFC 4764 Specification Required (Expert: Joseph Salowey)
Hash Algorithms	RFC 4793 0x0006-0x7fff: Specification Required and IESG Approval. 0x8000-0xffff: Proprietary vendor-specific algorithms. (Expert: Joseph Salowey)
MAC Algorithms	RFC 4793 0x0002-0x7fff: Specification Required and IESG Approval. 0x8000-0xffff: Vendor-specific proprietary algorithms. (Expert: Joseph Salowey)
MAC ID Namespace	RFC 4746 Expert Review (Expert: Joseph Salowey)
Message Types	RFC 6696 IETF Review
Method Types	RFC 3748 1-191: Specification Required. 192-253: Standards Action. 254: Expanded Type. 255: Experimental. 256-4294967295: Specification Required. (Expert: Joseph Salowey)
non-skippable attributes	RFC 4763 IETF Review with Specification Required (Expert: Unassigned)
Packet Codes	RFC 3748 Standards Action
Public Key ID Namespace	RFC 4746 Expert Review (Expert: Joseph Salowey)
Re-authentication Cryptosuites	RFC 6696 IETF Review
skippable attributes	RFC 4763 IETF Review
Subtypes	RFC 4187 Specification Required (Expert: Vesa Lehtovirta)
TEAP Error TLV (value 5) Error Codes
TEAP Error TLV (value 5) Error Codes	Internet Draft draft-ietf-emu-rfc7170bis-19 Specification Required (Expert: Margaret Cullen, Nancy Cam-Winget)
TEAP Identity-Type TLV (value 2) Registry
TEAP Identity-Type TLV (value 2) Registry	Internet Draft draft-ietf-emu-rfc7170bis-19 Specification Required (Expert: Unassigned)
TEAP PAC TLV (value 11) PAC Attribute Type Codes
TEAP PAC TLV (value 11) PAC Attribute Type Codes	Internet Draft draft-ietf-emu-rfc7170bis-19 Registry closed
TEAP PAC TLV (value 11) PAC-Type Type Codes
TEAP PAC TLV (value 11) PAC-Type Type Codes	Internet Draft draft-ietf-emu-rfc7170bis-19 Registry closed
TEAP Request-Action TLV (value 8) Registry
TEAP Request-Action TLV (value 8) Registry	Internet Draft draft-ietf-emu-rfc7170bis-19 Specification Required (Expert: Unassigned)
TEAP Status Codes
TEAP Status Codes	Internet Draft draft-ietf-emu-rfc7170bis-19 Specification Required (Expert: Unassigned)
TEAP TLV Types
TEAP TLV Types	Internet Draft draft-ietf-emu-rfc7170bis-19 Specification Required (Expert: Margaret Cullen, Nancy Cam-Winget)
TEAP Trusted-Server-Root TLV (value 17) Credential-Format Codes
TEAP Trusted-Server-Root TLV (value 17) Credential-Format Codes	Internet Draft draft-ietf-emu-rfc7170bis-19 Specification Required (Expert: Unassigned)
Trusted Non-3GPP Access EAP Parameters	RFC 7458 Specification Required (Expert: Jouni Korhonen)
Extensible Authentication Protocol (EAP) Channel-Binding Parameters
EAP Channel-Binding Codes	RFC 6677 Standards Action
EAP Channel-Binding Namespaces	RFC 6677 IETF Review
Extensible Authentication Protocol (EAP) Encrypted Key Exchange (EKE) Registry
EAP-EKE Channel-Binding Type Registry	RFC 6124 Specification Required (Expert: Joseph Salowey)
EAP-EKE Diffie-Hellman Group Registry	RFC 6124 Specification Required (Expert: Joseph Salowey)
EAP-EKE Encryption Algorithm Registry	RFC 6124 Specification Required (Expert: Joseph Salowey)
EAP-EKE Exchange Registry	RFC 6124 RFC Required
EAP-EKE Failure-Code Registry	RFC 6124 RFC Required
EAP-EKE Identity Type Registry	RFC 6124 Specification Required (Expert: Joseph Salowey)
EAP-EKE Keyed Message Digest (MAC) Registry	RFC 6124 Specification Required (Expert: Joseph Salowey)
EAP-EKE Pseudo Random Function Registry	RFC 6124 Specification Required (Expert: Joseph Salowey)
Extensible Binary Meta Language (EBML)
EBML DocTypes	RFC 8794 First Come First Served
EBML Element IDs	RFC 8794 0x80-0xFE: RFC Required. 0x407F-0x7FFE: Specification Required. 0x203FFF-0x3FFFFE: First Come First Served. 0x101FFFFF-0x1FFFFFFE: Specification Required or First Come First Served. (Expert: Dave Rice (primary), Steve Lhomme (backup), Moritz Bunkus (backup))
Extensible Markup Language (XML) Configuration Access Protocol (XCAP) Parameters
XCAP Application Unique IDs	RFC 4825 Standards Action
Extensible Provisioning Protocol (EPP) Extensions
Extensions for the Extensible Provisioning Protocol (EPP)	RFC 7451 Specification Required (Expert: Scott Hollenbeck (primary), Alexander Mayrhofer (secondary), Ning Kong (secondary), Gavin Brown (secondary), Roger D Carney (secondary), Jim Galvin (secondary))
Extensible Provisioning Protocol (EPP) Organization Role Values
EPP Organization Role Values	RFC 8543 Expert Review (Expert: James Gould)
Extensible Provisioning Protocol (EPP) Repository Identifiers
EPP Repository Identifiers	RFC 5730 First Come First Served
F
FCAST Parameters
FCAST Object Metadata Encoding	RFC 6968 Expert Review (Expert: Unassigned)
FCAST Object Metadata Format	RFC 6968 Specification Required (Expert: Unassigned)
FCAST Object Metadata Types	RFC 6968 Expert Review (Expert: Unassigned)
Federated File System (FedFS) Parameters
FedFS Annotation Keys	RFC 7532 First Come First Served
FedFS Object Identifiers	RFC 7532 Registry Closed
Fibre Channel Port Types Registry
Fibre Channel Port Types	RFC 4044 1-9999: Specification Required. 10000-99999: Private Use. 100000 and higher: Reserved. (Expert: Claudio DeSanti)
Flow Spec Component Types
Flow Spec Component Types	RFC 8955,RFC 8956 0: Reserved. 1-127: Specification Required. 128-254: Expert Review. 255: Reserved. (Expert: Susan Hares, Robert Raszuk)
FLUTE - File Delivery over Unidirectional Transport (FLUTE) Parameters
FLUTE Content Encoding Algorithms	RFC 6726 Specification Required (Expert: Unassigned)
FOOBAR Address Family Numbers
Assigned FOOBAR Address Families	RFC 1639 IANA assignment
Forwarding and Control Element Separation (ForCES)
Association Setup Response	RFC 5810 0x00000000-0x000000FF: IETF Review. 0x00000100-0x0000FFFF: Specification Required. (Expert: Jamal Hadi Salim, Joel Halpern)
Association Teardown Message	RFC 5810 0x00000000-0x0000FFFF: IETF Review. 0x00010000-0x7FFFFFFF: Specification Required. (Expert: Jamal Hadi Salim, Joel Halpern)
Exception ID	RFC 6956 Specification Required (Expert: Jamal Hadi Salim, Joel Halpern)
EXTENDEDRESULT-TLV Result Values	RFC 7391 Specification Required (Expert: Unassigned)
Header Flags	RFC 5810 IETF Review
Logical Functional Block (LFB) Class Names and Class Identifiers	RFC 5812,RFC 7121 0-65535: Standards Action. >65535: First Come First Served with any publicly available specification.
Message Types	RFC 5810 0x00-0x1F: IETF Review. 0x20-0x7F: Specification Required. (Expert: Jamal Hadi Salim, Joel Halpern)
Metadata ID	RFC 6956 Specification Required (Expert: Jamal Hadi Salim, Joel Halpern)
Operation Selection (OPER-TLV) Types	RFC 5810 0x0000-0x00FF: IETF Review. 0x0100-0x7FFF: Specification Required. (Expert: Jamal Hadi Salim, Joel Halpern)
RESULT-TLV Result Values	RFC 5810 Expert Review (Expert: Jamal Hadi Salim, Joel Halpern)
TLV Types	RFC 5810 0x0000-0x01FF: IETF Review. 0x0200-0x7FFF: Specification Required. (Expert: Jamal Hadi Salim, Joel Halpern)
Validate Error ID	RFC 6956 Specification Required (Expert: Jamal Hadi Salim, Joel Halpern)
Free Lossless Audio Codec (FLAC)
FLAC Application Metadata Block IDs	RFC 9639 First Come First Served
FTP parameters
FTP Commands and Extensions	RFC 5797 registration marked "mandatory" ('m' in the "conf" column): Standards Action. all other registrations: Specification Required. (Expert: John Klensin)
G
General Internet Signalling Transport (GIST) Parameters
Additional Information Types	RFC 5971 First Come First Served
Error Code 1 Subcodes	RFC 5971 First Come First Served
Error Code 10 Subcodes	RFC 5971 First Come First Served
Error Code 12 Subcodes	RFC 5971 First Come First Served
Error Code 9 Subcodes	RFC 5971 First Come First Served
GIST Error Codes	RFC 5971 First Come First Served
GIST MA-Protocol-IDs	RFC 5971 0-63: IETF Review. 64-119: Expert Review. (Expert: Martin Stiemerling)
GIST Message Routing Methods	RFC 5971 0-63: IETF Review. 64-119: Specification Required. (Expert: Martin Stiemerling)
GIST Message Types	RFC 5971 0-31: IETF Review. 32-55: Expert Review. (Expert: Martin Stiemerling)
GIST Object Types	RFC 5971 0-1023: IETF Review. 1024-1999: Specification Required. (Expert: Martin Stiemerling)
NSIS Signaling Layer Protocol (NSLP) Identifiers	RFC 5971 IESG Approval
Generalized Multi-Protocol Label Switching (GMPLS) Signaling Parameters
Actions	RFC 3471 IETF Review or Specification Required (Expert: Unassigned)
Administrative Status Information Flags	RFC 4783 Standards Action
Association Type	RFC 4872 Standards Action
CWDM Channel Spacing Subregistry	RFC 6205 Standards Action
DWDM Channel Spacing Subregistry	RFC 6205 Standards Action
Ethernet Bandwidth Profiles	RFC 6003 Standards Action
Ethernet Sender TSpec TLVs/Ethernet Flowspec TLVs	RFC 6003 Standards Action
Ethernet Switching Granularities	RFC 6003 Standards Action
Generalized PIDs (G-PID)	RFC 3471,RFC 4328 0-31743: Standards Action. 31744-32767: Assigned Temporarily for Experimental Usage. 32768-65535: Standards Action.
Generalized SCSI (Switching Capability Specific Information) TLV Types	RFC 8258 Specification Required (Expert: Lou Berger, Vishnu Beeram)
Grid Subregistry	RFC 6205 Standards Action
Hierarchy Actions	RFC 6107 Standards Action
Interface_ID Types	RFC 3471 IETF Review or Specification Required (Expert: Unassigned)
LSP Encoding Types	RFC 3471,RFC 4328 0-239: Standards Action. 240-255: Assigned temporarily for Experimental Usage.
OTN Signal Type	RFC 7139,RFC 7892 0-255: Standards Action. 0-255: Specification Required. (Expert: Daniele Ceccarelli, Fatai Zhang)
Special Purpose Generalized Label Values	RFC 8359 Standards Action
Switching Types	RFC 3471,RFC 4328,RFC 7074 Standards Action
GeneRic Autonomic Signaling Protocol (GRASP) Parameters
GRASP Messages and Options	RFC 8990 Standards Action
GRASP Objective Names	RFC 8990 Specification Required (Expert: Michael Richardson)
Generic Routing Encapsulation (GRE) Parameters
GRE Protocol Types	RFC 2784 Need to go to IEEE
GRE Version Numbers	RFC 2784 IETF Review
Generic Security Service Application Program Interface (GSSAPI)/Kerberos/Simple Authentication and Security Layer (SASL) Service Names
GSSAPI/Kerberos/SASL Service Names	RFC 2743 Specification Required (Expert: Unassigned)
Generic Security Service Application Program Interface Parameters
GSS-API URN Parameters	RFC 7056 IETF Review or Expert Review (Expert: Unassigned)
Geolocation Policy
Geolocation Policy Location Profile Names	RFC 6772 Specification Required (Expert: Unassigned)
Geopriv HTTP Enabled Location Delivery (HELD) Parameters
HELD Error Codes	RFC 5985 Standards Action
Geopriv Identifiers
Geopriv Identifiers	RFC 7035 IETF Review
Geopriv Location Object Registries
Method Tokens	RFC 4119 First Come First Served
PIDF-LO Civic Address Considerations Registry	RFC 5774 Expert Review
XML Namespaces for 'provided-by' elements for use with PIDF-LO objects	RFC 4119 Expert Review (Expert: Primary: Allison Mankin, Secondary: Jon Peterson)
Geopriv Location Type Registries
Civic Address Types (CAtypes)	RFC 4776,RFC 6848 Type=A: IETF Review. Type=B: Expert Review. (Expert: Martin Thomson)
Location Types	RFC 4589 Expert Review (Expert: Martin Thomson)
Relative Location Parameters	RFC 7035 IETF Review
Global Navigation Satellite System (GNSS)
Global Navigation Satellite System (GNSS) Types	RFC 7105 Specification Required (Expert: Unassigned)
Global Switch Management Protocol version 3 (GSMPv3) Adaptation Type Name Space
Adaptation Types	RFC 3292 0x000-0x2FF: IETF Review. 0x300-0xFFF: First Come First Served.
Global Switch Management Protocol version 3 (GSMPv3) Event Flag Name Space
Event Flags	RFC 3292 Expert Review (Expert: Stefaan De Cnodder, Avri Doria)
Global Switch Management Protocol version 3 (GSMPv3) Failure Response Message Name Space
Failure Response Message Names	RFC 3292 0-59: IETF Review. 60-79: Reserved for Vendor Private Extensions. 80-127: IETF Review. 128-159: Reserved for Vendor Private Extensions. 160-255: IETF Review.
Global Switch Management Protocol version 3 (GSMPv3) Label Type Name Space
Label Type Names	RFC 3292 0x000-0xAFF: IETF Review. 0xB00-0xEFF: RFC Required. 0xF00-0xFFF: Reserved for vendor private use.
Global Switch Management Protocol version 3 (GSMPv3) Message Type Name Space
Message Types	RFC 3292 0-99: IETF Review. 100-199: RFC Required. 200-249: Intended for Abstract and Resource Model Extension Messages. 250-255: Reserved for vendor private use.
Global Switch Management Protocol version 3 (GSMPv3) Model Type Name Space
Model Type Names	RFC 3292 0: IETF Review. 1-200: RFC Required. 201-255: Reserved for vendor private use.
Global Switch Management Protocol version 3 (GSMPv3) Port Type Name Space
Port Type Names	RFC 3292 0-127: IETF Review. 128-255: RFC Required or Specification Required. (Expert: Unassigned)
Global Switch Management Protocol version 3 (GSMPv3) Result Type Name Space
Result Type Names	RFC 3292 Expert Review (Expert: Stefaan De Cnodder, Avri Doria)
Global Switch Management Protocol version 3 (GSMPv3) Service ID Name Space
Service ID Names	RFC 3292 0-1023: IETF Review. 1024-65535: RFC Required.
Global Switch Management Protocol version 3 (GSMPv3) Traffic Control Name Space
Traffic Control Flags	RFC 3292 Expert Review (Expert: Stefaan De Cnodder, Avri Doria)
Global Switched Telephone Network (GSTN) Address Element Extensions in Email Services
Qual2-Label	RFC 2846 Specification Required (Expert: Unassigned)
Qualif-Type 1	RFC 2846,RFC 3191 Specification Required (Expert: Unassigned)
Service Selector	RFC 2846,RFC 3191 Specification Required (Expert: Unassigned)
GMPLS Routing Parameters for WSON
Types for Subfields of WSON Resource Block Information Registry	RFC 7581 Standards Action
Grant Negotiation and Authorization Protocol (GNAP)
GNAP Access Token Flags	RFC 9635 Specification Required (Expert: Justin Richer, Joseph Salowey, Sudesha Shetty)
GNAP Assertion Formats	RFC 9635 Specification Required (Expert: Justin Richer, Joseph Salowey, Sudesha Shetty)
GNAP Authorization Server Discovery Fields	RFC 9635 Specification Required (Expert: Justin Richer, Joseph Salowey, Sudesha Shetty)
GNAP Client Instance Display Fields	RFC 9635 Specification Required (Expert: Justin Richer, Joseph Salowey, Sudesha Shetty)
GNAP Client Instance Fields	RFC 9635 Specification Required (Expert: Justin Richer, Joseph Salowey, Sudesha Shetty)
GNAP Error Codes	RFC 9635 Specification Required (Expert: Justin Richer, Joseph Salowey, Sudesha Shetty)
GNAP Grant Request Parameters	RFC 9635 Specification Required (Expert: Justin Richer, Joseph Salowey, Sudesha Shetty)
GNAP Grant Response Parameters	RFC 9635 Specification Required (Expert: Justin Richer, Joseph Salowey, Sudesha Shetty)
GNAP Interaction Finish Methods	RFC 9635 Specification Required (Expert: Justin Richer, Joseph Salowey, Sudesha Shetty)
GNAP Interaction Hints	RFC 9635 Specification Required (Expert: Justin Richer, Joseph Salowey, Sudesha Shetty)
GNAP Interaction Mode Responses	RFC 9635 Specification Required (Expert: Justin Richer, Joseph Salowey, Sudesha Shetty)
GNAP Interaction Start Modes	RFC 9635 Specification Required (Expert: Justin Richer, Joseph Salowey, Sudesha Shetty)
GNAP Key Formats	RFC 9635 Specification Required (Expert: Justin Richer, Joseph Salowey, Sudesha Shetty)
GNAP Key Proofing Methods	RFC 9635 Specification Required (Expert: Justin Richer, Joseph Salowey, Sudesha Shetty)
GNAP Resource Set Registration Request Parameters	Internet Draft draft-ietf-gnap-resource-servers-09 Expert Review (Expert: Unassigned)
GNAP Resource Set Registration Response Parameters	Internet Draft draft-ietf-gnap-resource-servers-09 Expert Review (Expert: Unassigned)
GNAP RS-Facing Discovery Document Fields	Internet Draft draft-ietf-gnap-resource-servers-09 Expert Review (Expert: Unassigned)
GNAP RS-Facing Error Codes	Internet Draft draft-ietf-gnap-resource-servers-09 Specification Required (Expert: Unassigned)
GNAP Subject Information Request Fields	RFC 9635 Specification Required (Expert: Justin Richer, Joseph Salowey, Sudesha Shetty)
GNAP Subject Information Response Fields	RFC 9635 Specification Required (Expert: Justin Richer, Joseph Salowey, Sudesha Shetty)
GNAP Token Formats	Internet Draft draft-ietf-gnap-resource-servers-09 Specification Required (Expert: Unassigned)
GNAP Token Introspection Request	Internet Draft draft-ietf-gnap-resource-servers-09 Specification Required (Expert: Unassigned)
GNAP Token Introspection Response	Internet Draft draft-ietf-gnap-resource-servers-09 Specification Required (Expert: Unassigned)
Group Domain of Interpretation (GDOI) Payloads
GAP Payload Policy Attributes	RFC 6407 Standards Action
GDOI DOI Exchange Types	RFC 8263 Specification Required (Expert: Brian Weis)
GDOI ID Payload Type Values	RFC 3547 Standards Action
GDOI SA TEK Attributes	RFC 8052 Expert Review (Expert: Brian Weis, Tero Kivinen)
ID Types	RFC 8052 Expert Review (Expert: Brian Weis, Tero Kivinen)
IEC 62351-9 Authentication Values	RFC 8052 Expert Review (Expert: Brian Weis, Tero Kivinen)
IEC 62351-9 Confidentiality Values	RFC 8052 Expert Review (Expert: Brian Weis, Tero Kivinen)
Key Download Type Values	RFC 3547 Standards Action
SA KEK Payload Values
SA TEK Payload Values
Group Secure Association Group Management Protocol (GSAKMP) Parameters
GSAKMP Acknowledgment Types	RFC 4535 Standards Action
GSAKMP Certificate Types	RFC 4535 Expert Review (Expert: Unassigned)
GSAKMP Cryptographic Key Types	RFC 4535 Expert Review (Expert: Unassigned)
GSAKMP Exchange Types	RFC 4535 Standards Action
GSAKMP Group Identification Types	RFC 4535 Standards Action
GSAKMP Identification Classification	RFC 4535 Standards Action
GSAKMP Identification Types	RFC 4535 Expert Review (Expert: Unassigned)
GSAKMP Key Creation Types	RFC 4535 Expert Review (Expert: Unassigned)
GSAKMP Key Download Data Item Types	RFC 4535 Standards Action
GSAKMP Mechanism Types	RFC 4535 Standards Action
GSAKMP Nonce Hash Types	RFC 4535 Expert Review (Expert: Unassigned)
GSAKMP Nonce Types	RFC 4535 Standards Action
GSAKMP Notification Types	RFC 4535 Standards Action
GSAKMP Payload Types	RFC 4535 Standards Action
GSAKMP Policy Token Types	RFC 4535 Standards Action
GSAKMP Rekey Event Types	RFC 4535 Standards Action
GSAKMP Signature Types	RFC 4535 Expert Review (Expert: Unassigned)
H
Hash Algorithms for HTTP Digest Fields
Hash Algorithms for HTTP Digest Fields	RFC 9530 Specification Required (Expert: Roberto Polli (primary), Lucas Pardue (secondary))
Hash Function Textual Names
Hash Function Textual Names	RFC 8122 Standards Action
Hash-Based Signatures
Leighton-Micali Signatures (LMS)	RFC 8554 0x00000005-0xDDDDDDDC: Specification Required. 0xDDDDDDDD-0xFFFFFFFF: Private Use. (Expert: David McGrew, Scott Fluhrer)
LM-OTS Signatures	RFC 8554 0x00000001-0xDDDDDDDC: Specification Required. 0xDDDDDDDD-0xFFFFFFFF: Private Use. (Expert: David McGrew, Scott Fluhrer)
WOTS+ Signatures	RFC 8391 Specification Required (Expert: Andreas Huelsing, Stefan-Lukas Gazdag)
XMSS Signatures	RFC 8391 Specification Required (Expert: Andreas Huelsing, Stefan-Lukas Gazdag)
XMSS^MT Signatures	RFC 8391 Specification Required (Expert: Andreas Huelsing, Stefan-Lukas Gazdag)
Host Identity Protocol (HIP) Parameters
DI-Types	RFC 7401 IETF Review
ESP Transform Suite IDs	RFC 7402 IETF Review
Group IDs	RFC 7401 IETF Review
HI Algorithm	RFC 7401 IETF Review
HIP Certificate Types	RFC 8002 IETF Review
HIP Cipher ID	RFC 7401 IETF Review
HIP NAT Traversal Modes	RFC 5770 IETF Review
HIP Transport Modes	RFC 6261 IETF Review or IESG Approval
HIP Version	RFC 7401 IETF Review
HIP Via Flags	RFC 6028 IETF Review or IESG Approval
HIT Suite ID	RFC 7401 IETF Review
Notify Message Types	RFC 7401 1-50: IETF Review. 51-8191: Specification Required. 8192-16383: Reserved for Private Use. 16384-40959: Specification Required. 40960-65535: Reserved for Private Use. (Expert: Robert Moskowitz, Jeff Ahrenholz)
Packet Types	RFC 7401 IETF Review
Parameter Types	RFC 7401 0-1023: IETF Review. 1024-32767: Specification Required. 32768-49151: Reserved for Private Use. 49152-61439: Specification Required. 61440-65535: IETF Review. (Expert: Robert Moskowitz, Jeff Ahrenholz)
Registration Failure Types	RFC 8003 0-200: IETF Review. 201-255: Reserved for Private Use.
Registration Types	RFC 8003 0-200: IETF Review. 201-255: Reserved for Private Use.
Suite IDs	RFC 5201 Registry closed perRFC 7401
HTTP Message Signature
HTTP Signature Algorithms	RFC 9421 Specification Required (Expert: Justin Richer, Manu Sporny)
HTTP Signature Component Parameters	RFC 9421 Expert Review (Expert: Justin Richer, Manu Sporny)
HTTP Signature Derived Component Names	RFC 9421 Expert Review (Expert: Justin Richer, Manu Sporny)
HTTP Signature Metadata Parameters	RFC 9421 Expert Review (Expert: Justin Richer, Manu Sporny)
HTTP Origin-Bound Authentication (HOBA) Parameters
HOBA Device Identifier Types	RFC 7486 Specification Required (Expert: Unassigned)
HOBA Key Identifier Types	RFC 7486 Specification Required (Expert: Unassigned)
HOBA Signature Algorithms	RFC 7486 Specification Required (Expert: Unassigned)
Hybrid Public Key Encryption (HPKE)
HPKE AEAD Identifiers	RFC 9180 Specification Required (Expert: Christopher Wood, Richard Barnes)
HPKE KDF Identifiers	RFC 9180 Specification Required (Expert: Christopher Wood, Richard Barnes)
HPKE KEM Identifiers	RFC 9180 Specification Required (Expert: Christopher Wood, Richard Barnes)
Hypertext Transfer Protocol (HTTP) Alt-Svc Parameter Registry
HTTP Alt-Svc Parameter Registry	RFC 7838 Expert Review (Expert: Unassigned)
Hypertext Transfer Protocol (HTTP) Authentication Control Parameters
HTTP Authentication Control Parameters	RFC 8053 Specification Required (Expert: Rifaat Shekh-Yusef, Yutaka Oiwa)
HTTP Mutual Authentication Host Validation Methods	RFC 8120 Expert Review (Expert: Rifaat Shekh-Yusef, Yutaka Oiwa)
Hypertext Transfer Protocol (HTTP) Authentication Scheme Registry
HTTP Authentication Schemes	RFC 9110 IETF Review
HTTP Mutual Authentication Algorithms	RFC 8120 Expert Review (Expert: Rifaat Shekh-Yusef, Yutaka Oiwa)
Hypertext Transfer Protocol (HTTP) Cache Directive Registry
HTTP Cache Directive Registry	RFC 9111 IETF Review
Hypertext Transfer Protocol (HTTP) Cache-Status
HTTP Cache-Status	RFC 9211 Expert Review (Expert: Mark Nottingham)
Hypertext Transfer Protocol (HTTP) Digest Algorithm Values
Hash Algorithms for HTTP Digest Authentication	RFC 7616 Specification Required (Expert: Unassigned)
HTTP Digest Algorithm Values	RFC 3230 RFC Required or Specification Required (Expert: James Manger)
Hypertext Transfer Protocol (HTTP) Field Name Registry
Hypertext Transfer Protocol (HTTP) Field Name Registry	RFC 9110,RFC 9651 Specification Required for Permanent registrations,Expert Review for Provisional registrations. (Expert: Mark Nottingham, Roy Fielding)
Hypertext Transfer Protocol (HTTP) Method Registry
HTTP Method Registry	RFC 9110 IETF Review
Hypertext Transfer Protocol (HTTP) Parameters
HTTP Content Coding Registry	RFC 9110 IETF Review
HTTP Forwarded Parameters	RFC 7239 IETF Review
HTTP Preferences	RFC 7240 Specification Required (Expert: Julian Reschke)
HTTP Range Unit Registry	RFC 9110 IETF Review
HTTP Transfer Coding Registry	RFC 9112 IETF Review
Hypertext Transfer Protocol (HTTP) Priority
HTTP Priority	RFC 9218 Key length of one: Specification Required. Key length greater than one: Expert Review. (Expert: Lucas Pardue, Kazuho Oku)
Hypertext Transfer Protocol (HTTP) Problem Types
HTTP Problem Types	RFC 9457 Specification Required (Expert: Mark Nottingham, Sanjay Dalal)
Hypertext Transfer Protocol (HTTP) Proxy-Status
HTTP Proxy Error Types	RFC 9209 Expert Review (Expert: Mark Nottingham)
HTTP Proxy-Status Parameters	RFC 9209 Expert Review (Expert: Mark Nottingham)
Hypertext Transfer Protocol (HTTP) Status Code Registry
HTTP Status Codes	RFC 9110 IETF Review
Hypertext Transfer Protocol (HTTP) Upgrade Token Registry
HTTP Upgrade Tokens	RFC 9110 First Come First Served
Hypertext Transfer Protocol (HTTP) Warn Codes
HTTP Warn Codes	RFC 7234 IETF Review
Hypertext Transfer Protocol version 2 (HTTP/2) Parameters
HTTP/2 Error Code	RFC 9113 Expert Review (Expert: Martin Thomson (primary), Julian Reschke (secondary))
HTTP/2 Frame Type	RFC 9113 IETF Review or IESG Approval
HTTP/2 Settings	RFC 9113 Expert Review (Expert: Martin Thomson (primary), Julian Reschke (secondary))
Hypertext Transfer Protocol version 3 (HTTP/3)
HTTP/3 Error Codes	RFC 9114 provisional: Expert Review. provisional registration date field update: First Come First Served. permanent, 0x00-0x3f: Standards Action or IESG Approval. permanent, greater than 0x3f: Specification Required. values 0x1f * N + 0x21 (for non-negative integer values of N): Reserved. first unassigned codepoint: Standards Action. (Expert: Mike Bishop, Alan Frindell)
HTTP/3 Frame Types	RFC 9114 provisional: Expert Review. provisional registration date field update: First Come First Served. permanent, 0x00-0x3f: Standards Action or IESG Approval. permanent, greater than 0x3f: Specification Required. values 0x1f * N + 0x21 (for non-negative integer values of N): Reserved. first unassigned codepoint: Standards Action. (Expert: Mike Bishop, Alan Frindell)
HTTP/3 Settings	RFC 9114 provisional: Expert Review. provisional registration date field update: First Come First Served. permanent, 0x00-0x3f: Standards Action or IESG Approval. permanent, greater than 0x3f: Specification Required. values 0x1f * N + 0x21 (for non-negative integer values of N): Reserved. first unassigned codepoint: Standards Action. (Expert: Mike Bishop, Alan Frindell)
HTTP/3 Stream Types	RFC 9114 provisional: Expert Review. provisional registration date field update: First Come First Served. permanent, 0x00-0x3f: Standards Action or IESG Approval. permanent, greater than 0x3f: Specification Required. values 0x1f * N + 0x21 (for non-negative integer values of N): Reserved. first unassigned codepoint: Standards Action. (Expert: Mike Bishop, Alan Frindell)
I
IANA OUI Ethernet Numbers
IANA Link Layer Discovery Protocol (LLDP) TLV Subtypes	RFC 8520,RFC 9542 Expert Review (Expert: Eliot Lear, Dan Romascanu)
IANA MAC ADDRESS BLOCK	RFC 9542 SeeRFC 9542. (Expert: Donald Eastlake (primary), Juan Carlos Zuniga (secondary))
SNAP Protocol Numbers	RFC 9542 Expert Review (Expert: Donald Eastlake (primary), Juan Carlos Zuniga (secondary))
The CFxxxx Series
IANA-Maintained MIBs
IANA-ADDRESS-FAMILY-NUMBERS-MIB	RFC 2677
IANA-BFD-TC-STD-MIB	RFC 7330 IETF Review
IANA-CHARSET-MIB	RFC 3808 See Character Sets
IANA-ENERGY-RELATION-MIB	RFC 7461 Specification Required (Expert: Unassigned)
IANA-ENTITY-MIB	RFC 6933 Expert Review (Expert: Andy Bierman (primary), Jürgen Schönwälder (secondary))
IANA-FINISHER-MIB	RFC 3806 Expert Review (Expert: Ira McDonald, Michael Sweet)
IANA-GMPLS-TC-MIB	RFC 4802 See individual GMPLS registry procedures
IANA-IPPM-METRICS-REGISTRY-MIB	RFC 4148,RFC 6248 This module has been designated Obsolete. The registry will no longer be updated, and the current contents will be maintained as-is.
IANA-ITU-ALARM-TC-MIB	RFC 3877 Expert Review (Expert: Unassigned)
IANA-LANGUAGE-MIB	RFC 3165 Expert Review (Expert: Juergen Schoenwaelder, David Levi)
IANA-MALLOC-MIB	RFC 3559 RFC or designated expert review (Expert: Dave Thaler)
IANA-MAU-MIB	RFC 4836 Expert Review (Expert: Marek Hajduczenia, Operations and Management Area Directors (backup))
IANA-POWER-STATE-SET-MIB	RFC 7460 Seehttps://www.iana.org/assignments/power-state-sets
IANA-PRINTER-MIB	RFC 3805 Expert Review or RFC Required (Expert: Ira McDonald, Michael Sweet)
IANA-RTPROTO-MIB	RFC 2932 RFC or Expert Review (Expert: Dave Thaler)
IANA-SMF-MIB	RFC 7367 IANAsmfOpModeIdTC: First Come First Served. IANAsmfRssaIdTC: 1-127, Standards Action; 128-239, Reserved for Private or Local Use; 240-255, Experimental RFC.
IANA-STORAGE-MEDIA-TYPE-MIB	RFC 7666 Expert Review (Expert: Unassigned)
IANAifType-MIB	RFC 2863,RFC 8892 This is one of the available formats of the Interface Types (ifType) and Tunnel Types (tunnelType) registries. (Expert: Dave Thaler (primary), Dan Romascanu (secondary))
IANAolsrv2LinkMetricType-MIB	RFC 7184 Expert Review (Expert: Unassigned)
IANATn3270eTC-MIB	RFC 2561 Working Group Review (see DESCRIPTION clause associated with the MODULE-IDENTITY statement)
iCalendar Element Registries
Actions	RFC 5545 Expert Review with RFC Required (Expert: Bernard Desruisseaux, Ken Murchison, Mike Douglass)
Calendar User Types	RFC 5545 Expert Review with RFC Required (Expert: Bernard Desruisseaux, Ken Murchison, Mike Douglass)
Classifications	RFC 5545 Expert Review with RFC Required (Expert: Bernard Desruisseaux, Ken Murchison, Mike Douglass)
Components	RFC 5545 Expert Review with RFC Required (Expert: Bernard Desruisseaux, Ken Murchison, Mike Douglass)
Display Types	RFC 7986 Expert Review with RFC Required (Expert: Unassigned)
Feature Types	RFC 7986 Expert Review with RFC Required (Expert: Unassigned)
Free/Busy Time Types	RFC 5545 Expert Review with RFC Required (Expert: Bernard Desruisseaux, Ken Murchison, Mike Douglass)
Methods	RFC 5545 Expert Review with RFC Required (Expert: Bernard Desruisseaux, Ken Murchison, Mike Douglass)
Parameters	RFC 5545 Expert Review with RFC Required (Expert: Bernard Desruisseaux, Ken Murchison, Mike Douglass)
Participant Types	RFC 9073 Expert Review (Expert: Ken Murchison, Michael Douglass)
Participation Roles	RFC 5545 Expert Review with RFC Required (Expert: Bernard Desruisseaux, Ken Murchison, Mike Douglass)
Participation Statuses	RFC 5545 Expert Review with RFC Required (Expert: Bernard Desruisseaux, Ken Murchison, Mike Douglass)
Properties	RFC 5545 Expert Review with RFC Required (Expert: Bernard Desruisseaux, Ken Murchison, Mike Douglass)
Proximity Values	RFC 9074 Expert Review with RFC Required (Expert: Ken Murchison, Michael Douglass)
Relationship Types	RFC 5545 Expert Review with RFC Required (Expert: Bernard Desruisseaux, Ken Murchison, Mike Douglass)
REQUEST-STATUS Values	RFC 5546 Expert Review with RFC Required (Expert: Bernard Desruisseaux, Ken Murchison, Mike Douglass)
Resource Types	RFC 9073 Expert Review (Expert: Ken Murchison, Michael Douglass)
Schedule Agent Values Registry	RFC 6638 Expert Review with RFC Required (Expert: Unassigned)
Schedule Force Send Values Registry	RFC 6638 Expert Review with RFC Required (Expert: Unassigned)
Value Data Types	RFC 5545 Expert Review with RFC Required (Expert: Bernard Desruisseaux, Ken Murchison, Mike Douglass)
IDNA Rules and Derived Property Values
IDNA Contextual Rules	RFC 5892,RFC 6452,RFC 8753,RFC 9233 IETF Review
IDNA Derived Properties	RFC 5892,RFC 6452,RFC 8753,RFC 9233 Expert Review (Expert: Patrik Faltstrom (team lead), Takahiro Nemoto, Peter Saint-Andre)
IEEE 802 Numbers
Ethertypes	RFC 9542 Not assigned by IANA. PerRFC 9542, updates to this registry are coordinated with the expert. (Expert: Donald Eastlake (primary), Juan Carlos Zuniga (secondary))
Logical Link Control (LLC) Numbers	Not assigned by IANA. PerRFC 9542, updates to this registry are coordinated with the expert. (Expert: Donald Eastlake (primary), Juan Carlos Zuniga (secondary))
Organizationally Unique Identifiers	Not assigned by IANA. PerRFC 9542, updates to this registry are coordinated with the expert. (Expert: Donald Eastlake (primary), Juan Carlos Zuniga (secondary))
IEEE Std 802.15.4 IETF IE Subtype IDs
IEEE Std 802.15.4 IETF IE Subtype IDs	RFC 8137 Expert Review (Expert: Tero Kivinen, Pat Kinney)
IETF XML Registry
ns	RFC 3688 Specification Required (Expert: Tim Bray, Martin Thomson)
publicid	RFC 3688 Specification Required (Expert: Tim Bray, Martin Thomson)
rdfschema	Specification Required (Expert: Tim Bray, Martin Thomson)
schema	RFC 3688,RFC 6685 Specification Required (Expert: Tim Bray and Martin Thomson for non-IODEF schemas, Kathleen Moriarty for IODEF schemas)
In Situ OAM (IOAM)
IOAM DEX Extension-Flags	RFC 9326 IETF Review
IOAM DEX Flags	RFC 9326 IETF Review
IOAM E2E-Type	RFC 9197 IETF Review
IOAM Namespace-ID	RFC 9197 0x0000: Expert Review. 0x0001-0x7FFF: Private Use. 0x8000-0xFFFF: Expert Review. (Expert: Unassigned)
IOAM Option-Type	RFC 9197 IETF Review
IOAM POT-Flags	RFC 9197 IETF Review
IOAM POT-Type	RFC 9197 IETF Review
IOAM Trace-Flags	RFC 9197 IETF Review
IOAM Trace-Type	RFC 9197 IETF Review
In Situ OAM (IOAM) Capabilities
IOAM SoP Capability	Internet Draft draft-ietf-ippm-ioam-conf-state-10 IETF Review
IOAM TSF Capability	Internet Draft draft-ietf-ippm-ioam-conf-state-10 IETF Review
Incident Object Description Exchange Format (IODEF)
Structured Cybersecurity Information (SCI) Specifications	RFC 7203 Specification Required (Expert: Unassigned)
Incident Object Description Exchange Format v2 (IODEF)
Address-category	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
BulkObservable-type	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
BusinessImpact-severity	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
BusinessImpact-type	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
Confidence-rating	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
Contact-role	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
Contact-type	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
Counter-type	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
Counter-unit	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
Discovery-source	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
DomainData-domain-status	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
DomainData-system-status	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
Email-type	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
Expectation-action	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
ExtensionType-dtype	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
HashData-scope	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
Incident-purpose	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
Incident-status	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
IndicatorExpression-operator	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
Key-registryaction	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
NodeRole-category	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
PostalAddress-type	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
RecordPattern-offsetunit	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
RecordPattern-type	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
RegistryHandle-registry	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
Restriction	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
SoftwareReference-dtype	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
SoftwareReference-spec-id	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
System-category	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
System-ownership	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
SystemImpact-type	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
Telephone-type	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
TimeImpact-duration	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
TimeImpact-metric	RFC 7970 Expert Review (Expert: Roman Danyliw, Takeshi Takahashi)
Instance Manipulation Values
Instance Manipulation Values	RFC 3229 Specification Required (Expert: Unassigned)
Instant Message Disposition Notification (IMDN) Headers
IMDN Headers	RFC 5438 Specification Required (Expert: Unassigned)
Instant Messaging SRV Protocol Label Registry
Instant Messaging SRV Protocol Label Registry	RFC 3861 Specification Required (Expert: Unassigned)
Integrated Services Parameters
Compression Hints	RFC 3006 IETF Review
Parameter Names	RFC 2216 1-127: Parameters defined inRFC 2215. 128-254: Parameters defined by author of service specificationdocument (Service and Data Element Naming).
Service Names	RFC 2216 2-127: RFC Required. 128-254: Experimental use.
Inter-Asterisk eXchange (IAX) Parameters
IAX Authentication Methods	RFC 5457 Expert Review (Expert: Cullen Jennings)
IAX Calling Presentation	RFC 5457 Expert Review (Expert: Cullen Jennings)
IAX Calling Type of Number	RFC 5457 Expert Review (Expert: Cullen Jennings)
IAX Cause Codes	RFC 5457 Expert Review (Expert: Cullen Jennings)
IAX Control Frame Subclass	RFC 5457 Expert Review (Expert: Cullen Jennings)
IAX Control Frames	RFC 5457 Expert Review (Expert: Cullen Jennings)
IAX Dialplan Status Flags	RFC 5457 Expert Review (Expert: Cullen Jennings)
IAX Encryption Methods	RFC 5457 Expert Review (Expert: Cullen Jennings)
IAX Frame Types	RFC 5457 Expert Review (Expert: Cullen Jennings)
IAX HTML Command Subclasses	RFC 5457 Expert Review (Expert: Cullen Jennings)
IAX Information Elements	RFC 5457 Expert Review (Expert: Cullen Jennings)
IAX Media Formats	RFC 5457 Expert Review (Expert: Cullen Jennings)
IAX Meta Commands	RFC 5457 Expert Review (Expert: Cullen Jennings)
IAX Transit Network Identification Plan	RFC 5457 Expert Review
IAX Type of Network	RFC 5457 Expert Review (Expert: Cullen Jennings)
Interactive Connectivity Establishment (ICE)
ICE Options	RFC 8839 Specification Required (Expert: Ari Keränen)
ICE Transport Protocols	RFC 6544 IETF Review or IESG Approval
Interface Parameters
Interface Types (ifType)	RFC 1213,RFC 2863,RFC 7224,RFC 8892 Expert Review (Expert: Dave Thaler (primary), Dan Romascanu (secondary))
Transmission Number Values	RFC 1213,RFC 8892 Specification Required (Expert: Dave Thaler (primary), Dan Romascanu (secondary))
Tunnel Types (tunnelType)	RFC 4087,RFC 8675,RFC 8892 Expert Review (Expert: Dave Thaler (primary), Dan Romascanu (secondary))
Interior Gateway Protocol (IGP) Parameters
IGP Algorithm Type For Computing Flooding Topology	Internet Draft draft-ietf-lsr-dynamic-flooding-18 Expert Review (Expert: Unassigned)
IGP Algorithm Types	RFC 8665 Standards Action
IGP Flexible Algorithm Definition Flags	RFC 9350 Standards Action
IGP Metric-Type	RFC 9350,Internet Draft draft-ietf-lsr-flex-algo-bw-con-22 Standards Action
IGP MSD-Types	RFC 8491,RFC 9702 Expert Review (Expert: Uma Chunduri, Jeff Tantsura)
Link Attribute Application Identifiers	RFC 9479 Expert Review (Expert: Les Ginsberg, Chris Hopps)
Path Computation Element (PCE) Capability Flags	RFC 9353 IETF Review
PCE Discovery (PCED) Sub-TLV Type Indicators	RFC 9353 Standards Action
Internet - Xerox Network System (XNS) Protocol Mappings
Internet - Xerox Network System (XNS) Protocol Mappings
Internet Control Message Protocol (ICMP) Parameters
Code Fields	RFC 2780
ICMP Extension Object Classes and Class Sub-types	RFC 4884 0-246: First Come First Served. 247-255: Private Use.
ICMP Type Numbers	RFC 2780 IESG Approval or Standards Action
Internet Control Message Protocol version 6 (ICMPv6) Parameters
6LoWPAN Capability Bits	RFC 7400 IETF Review or IESG Approval
Address Registration Option Flags	RFC 8505 IETF Review or IESG Approval
Address Registration Option I-Field	RFC 8505 IETF Review or IESG Approval
Address Registration Option Status Values	RFC 6775,RFC 9010 Standards Action
Certificate option (Type 16) Cert Type field	RFC 3971 Standards Action
Crypto-Types	RFC 8928 Specification Required or IESG Approval (Expert: Pascal Thubert, Mohit Sethi)
EDAR Message Flags	RFC 9685 IETF Review or IESG Approval
FMIPv6 Message Types (Value 154)	RFC 5568 RFC Required
ICMPv6 "Code" Fields	RFC 4443
ICMPv6 "type" Numbers	RFC 4443 0-127 (Error messages): IETF Review. 128-255 (Informational messages): IETF Review.
IPv6 ND Router Advertisement Flags	RFC 5175 Standards Action or IESG Approval
IPv6 Neighbor Discovery Option Formats	RFC 4861 RFC Required
IPv6 Neighbor Discovery Prefix Information Option Flags	RFC 8425 Standards Action
Option-Code for Handover Assist Information Option (Type 29)	RFC 5271 Standards Action or IESG Approval
Option-Code for Mobile Node Identifier Option (Type 30)	RFC 5271 Standards Action or IESG Approval
P-Field Values	RFC 9685 Standards Action
PvD Option Flags	RFC 8801 Standards Action
Qtypes	RFC 4620 IETF Review
Trust Anchor option (Type 15) Name Type field	RFC 3971,RFC 6495 Standards Action or IESG Approval
Internet Date/Time Format
Timestamp Suffix Tag Keys	RFC 9557 Permanent: Specification Required. Provisional: Expert Review. (Expert: Ujjwal Sharma, Bron Gondwana)
Internet Group Management Protocol (IGMP) Type Numbers
"Code" Fields	RFC 9778 Standards Action
IGMP Type Numbers	RFC 9778 Standards Action
IGMP/MLD Extension Types	RFC 9279 0-65533: IETF Review. 65534-65535: Experimental Use.
IGMP/MLD Query Message Flags	RFC 9778 Standards Action
IGMP/MLD Report Message Flags	RFC 9778 Standards Action
Internet Key Exchange (IKE) Attributes
Additional Exchanges Defined-- XCHG values	RFC 2409,RFC 9395 Registry closed
Attribute Classes	RFC 2409,RFC 9395 Registry closed
Encryption Algorithm Class Values (Value 1)	RFC 2409,RFC 9395 Registry closed
Exchange Type	RFC 2408,RFC 9395 Registry closed
Group Description (Value 4)	RFC 2409,RFC 9395 Registry closed
Group Type (Value 5)	RFC 2409,RFC 9395 Registry closed
Hash Algorithm (Value 2)	RFC 2409,RFC 9395 Registry closed
IPSEC Authentication Methods (Value 3)	RFC 2409,RFC 9395 Registry closed
ISAKMP Domain of Interpretation (DOI)	RFC 2408,RFC 9395 Registry closed
Life Type (Value 11)	RFC 2409,RFC 9395 Registry closed
Next Payload Types	RFC 2408,RFC 9395 Registry closed
Notify Message Types	RFC 2408,RFC 9395
Notify Messages - Error Types (1-8191)	RFC 2408,RFC 9395 Registry closed
PRF (Value 13)	RFC 2409,RFC 9395 Registry closed
Internet Key Exchange Version 2 (IKEv2) Parameters
Group Key Bag Attributes	Internet Draft draft-ietf-ipsecme-g-ikev2-21 Expert Review (Expert: Unassigned)
Group-wide Policy Attributes	Internet Draft draft-ietf-ipsecme-g-ikev2-21 Expert Review (Expert: Unassigned)
GSA Attributes	Internet Draft draft-ietf-ipsecme-g-ikev2-21 Expert Review (Expert: Unassigned)
IKEv2 Authentication Method	RFC 7296 Expert Review (Expert: Tero Kivinen, Valery Smyslov)
IKEv2 Certificate Encodings	RFC 7296 Expert Review (Expert: Tero Kivinen, Valery Smyslov)
IKEv2 Configuration Payload Attribute Types	RFC 7296 Expert Review (Expert: Tero Kivinen, Valery Smyslov)
IKEv2 Configuration Payload CFG Types	RFC 7296 Expert Review (Expert: Tero Kivinen, Valery Smyslov)
IKEv2 Exchange Types	RFC 7296 Expert Review (Expert: Tero Kivinen, Valery Smyslov)
IKEv2 Gateway Identity Types	RFC 5685 Expert Review (Expert: Tero Kivinen, Valery Smyslov)
IKEv2 Hash Algorithms	RFC 7427 Expert Review (Expert: Tero Kivinen, Valery Smyslov)
IKEv2 Identification Payload ID Types	RFC 7296 Expert Review (Expert: Tero Kivinen)
IKEv2 Notification IPCOMP Transform IDs (Value 16387)	RFC 7296 Expert Review (Expert: Tero Kivinen, Valery Smyslov)
IKEv2 Notify Message Error Types	RFC 7296 0-8191: Expert Review. 8192-16383: Private Use. (Expert: Tero Kivinen, Valery Smyslov)
IKEv2 Notify Message Status Types	RFC 7296 16384-40959: Expert Review. 40960-65535: Private Use. (Expert: Tero Kivinen, Valery Smyslov)
IKEv2 Payload Types	RFC 7296 Expert Review (Expert: Tero Kivinen, Valery Smyslov)
IKEv2 Post-quantum Preshared Key ID Types	RFC 8784 1-127: Expert Review. 128-255: Private Use. (Expert: Tero Kivinen, Valery Smyslov)
IKEv2 Secure Password Methods	RFC 6467 Expert Review (Expert: Tero Kivinen, Valery Smyslov)
IKEv2 Security Protocol Identifiers	RFC 7296 Expert Review (Expert: Tero Kivinen, Valery Smyslov)
IKEv2 Traffic Selector Types	RFC 7296 Expert Review (Expert: Tero Kivinen, Valery Smyslov)
Member Key Bag Attributes	Internet Draft draft-ietf-ipsecme-g-ikev2-21 Expert Review (Expert: Unassigned)
ROHC Attribute Types	RFC 5857 Expert Review (Expert: Tero Kivinen, Valery Smyslov)
Transform Type Values	RFC 7296,RFC 9370 Expert Review (Expert: Tero Kivinen, Valery Smyslov)
Internet Message Access Protocol (IMAP) Capabilities
IMAP and JMAP Keywords	RFC 5788,RFC 8621 Expert Review (Expert: Arnt Gulbrandsen, Barry Leiba)
IMAP ANNOTATE Extension Attributes	RFC 5257 Standards Track or IESG-Approved Experimental RFC
IMAP ANNOTATE Extension Entries	RFC 5257 Under vendor namespace: First Come First Served. Not under vendor namespace: Standards Track or IESG-Approved Experimental RFC.
IMAP Capabilities	RFC 3501,RFC 9051 IETF Review
IMAP Mailbox Name Attributes	RFC 3501,RFC 8457,RFC 9051 IETF Review or Expert Review (Expert: Barry Leiba, Bron Gondwana)
IMAP METADATA Mailbox Entry Registry	RFC 5464 Standards Track or IESG-Approved Experimental RFC
IMAP METADATA Server Entry Registry	RFC 5464 Standards Track or IESG-Approved Experimental RFC
IMAP Quota Resource Types	RFC 9208 Specification Required (Expert: Alexey Melnikov, Ken Murchison)
IMAP Response Codes	RFC 5530 Expert Review (Expert: Arnt Gulbrandsen, Dave Cridland)
IMAP Threading Algorithms	RFC 5256 Standards Track or IESG-Approved Experimental RFC
IMAP URLAUTH Access Identifiers and Prefixes	RFC 5593 IETF Review
IMAP URLAUTH Authorization Mechanism Registry	RFC 4467 Standards Track or IESG-Approved Experimental RFC
LIST-EXTENDED options	RFC 5258 FCFS; IANA approval template inRFC 5258 section 9.3
LIST-EXTENDED response	RFC 5258 IANA approval template inRFC 5258 section 9.3
Internet Message Store Events
Event Names	RFC 5423 name starts wth "vnd."; intended for private use: First Come First Served. name doesn't start with "vnd."; intended for interoperable use: IETF Review.
Event Parameters	RFC 5423 name starts wth "vnd."; intended for private use: First Come First Served. name doesn't start with "vnd."; intended for interoperable use: IETF Review.
Internet Open Trading Protocol (IOTP) Codes
Algorithm/Name	RFC 2801 Expert Review (Expert: David Burdett)
Attribute/Content	RFC 2801 RFC Required (Expert: David Burdett)
Brand/BrandId	RFC 2801 First Come First Served (Expert: David Burdett)
CurrencyAmount/CurrCode	RFC 2801 First Come First Served (Expert: David Burdett)
CurrencyAmount/CurrCodeType	RFC 2801 Expert Review (Expert: David Burdett)
DeliveryData/DelivMethod	RFC 2801 Expert Review (Expert: David Burdett)
PackagedContent/Content	RFC 2801 Expert Review (Expert: David Burdett)
RelatedTo/RelationshipType	RFC 2801 Expert Review (Expert: David Burdett)
Status/StatusType	RFC 2801 RFC Required (Expert: David Burdett)
TradingRole/Trading Role	RFC 2801 RFC Required (Expert: David Burdett)
TransId/IotpTransType	RFC 2801 RFC Required (Expert: David Burdett)
Internet Printing Protocol (IPP) Registrations
Attribute Group Tags	RFC 8011 Specification Required (Expert: Ira McDonald, Michael Sweet)
Attribute Syntaxes	RFC 8011 Specification Required (Expert: Ira McDonald, Michael Sweet)
Attributes	RFC 8011 Expert Review (Expert: Ira McDonald, Michael Sweet)
Enum Attribute Values	RFC 8011 type1: Specification Required. type2: Expert Review. (Expert: Ira McDonald, Michael Sweet)
Keyword Attribute Values	RFC 8011 type1: Specification Required. type2: Expert Review. (Expert: Ira McDonald, Michael Sweet)
Objects	RFC 8011 Specification Required (Expert: Ira McDonald, Michael Sweet)
Operations	RFC 8011 Expert Review (Expert: Ira McDonald, Michael Sweet)
Out-of-Band Attribute Value Tags	RFC 8011 Specification Required (Expert: Ira McDonald, Michael Sweet)
Status Codes	RFC 8011 Expert Review (Expert: Ira McDonald, Michael Sweet)
Internet Protocol version 4 (IPv4) Address Space
Allocations made from the Current Recovered IPv4 Pool	Global Policy for Post Exhaustion IPv4 Allocation Mechanisms by the IANA (Ratified 6 May 2012)
Current Recovered IPv4 Pool	Global Policy for Post Exhaustion IPv4 Allocation Mechanisms by the IANA (Ratified 6 May 2012)
IANA IPv4 Address Space Registry	RFC 7249 Allocations to RIRs are made in line with the Global Policy published athttp://www.icann.org/en/resources/policy/global-addressing. All other assignments require IETF Review.
IANA IPv4 Special-Purpose Address Registry	RFC 5736,RFC 6890,RFC 8190 IETF Review
Internet Protocol Version 4 (IPv4) Parameters
IP Option Numbers	Not defined
IP Time to Live Parameter	Not defined
IP TOS Parameters	Registrations no longer accepted
IPv4 Router Alert Option Values	RFC 5350 IETF Review
Type-of-Service Values	Registrations no longer accepted
Internet Protocol Version 6 (IPv6) Anycast Addresses
IPv6 Anycast Addresses	RFC 4291,RFC 2526 IESG Approval
IPv6 Anycast Subnet-Router Anycast Address	RFC 4291 IESG Approval
Internet Protocol version 6 (IPv6) Global Unicast Allocations
IANA IPv6 Special-Purpose Address Registry	RFC 4773,RFC 6890,RFC 8190 IETF Review
IPv6 Global Unicast Address Assignments	RFC 7249 Allocations to RIRs are made in line with the Global Policy published athttp://www.icann.org/en/resources/policy/global-addressing. All other assignments require IETF Review.
Internet Protocol Version 6 (IPv6) Parameters
Destination Options and Hop-by-Hop Options	RFC 8200,RFC 2780,RFC 9673 IESG Approval, IETF Review or Standards Action
IPv6 Extension Header Types	RFC 2780,RFC 5237,RFC 7045 Standards Action or IESG Approval
Next Header Types	RFC 8200,RFC 2780,RFC 7045
Routing Types	RFC 8200,RFC 5871 IETF Review or IESG Approval
RPL-option-TLV	RFC 6553 IETF Review
Segment Routing Header Flags	RFC 8754 IETF Review
Segment Routing Header TLVs	RFC 8754 IETF Review
TaggerId Types	RFC 6621 IETF Review
Internet Protocol Version 6 Address Space
Internet Protocol Version 6 Address Space
Internet Small Computer System Interface (iSCSI) Parameters
iSCSI Asynchronous Events	RFC 7143 Standards Action
iSCSI authentication methods	RFC 7143 IETF Review
iSCSI digests	RFC 7143 IETF Review
iSCSI Login Response Status Codes	RFC 7143 Standards Action
iSCSI Login/Text Keys	RFC 7145,RFC 7143 IETF Review
iSCSI Opcodes	RFC 7143 Standards Action to define the semantics of the opcode;Expert Review to select the specific opcode(s) (Expert: Unassigned)
iSCSI Protocol Level	RFC 7144 Expert Review and Standards Action (Expert: Unassigned)
iSCSI Reject Reason Codes	RFC 7143 Standards Action
iSCSI Task Management Function Codes	RFC 7143 Standards Action
iSCSI Task Management Function Response Codes	RFC 7144 Standards Action
iSER Opcodes	RFC 7145 Standards Action
SRP_GROUP key values	RFC 3723 Specification Required (Expert: Unassigned)
Internet Storage Name Service (iSNS) Parameters
Block Storage Protocols	RFC 4171 Expert Review (by IPS WG Chairperson or by Designated Expert) (Expert: David Black)
Standard iSNS Attributes	RFC 4171 IETF Review
Intrusion Detection Exchange Protocol (IDXP) Options
IDXP Options	RFC 4767 Expert Review (Expert: Ben Feinstein)
Intrusion Detection Message Exchange Format (IDMEF) Parameters
Attribute Values	RFC 4765 Specification Required (Expert: Unassigned)
Class and Attribute Names	RFC 4765 IETF Review
IP Flow Information Export (IPFIX) Entities
IPFIX Information Element Data Types	RFC 5610 Standards Action
IPFIX Information Element Semantics	RFC 5610 Standards Action
IPFIX Information Element Units	RFC 5610 Expert Review (Expert: IE Doctors (Andrew Feren, Brian Trammell, Nevil Brownlee, Paul Aitken))
IPFIX Information Elements	RFC 7012,RFC 9710 Expert Review (Expert: IE Doctors (Andrew Feren, Brian Trammell, Nevil Brownlee, Paul Aitken))
IPFIX ipv6ExtensionHeaders Bits	RFC 9740 Expert Review (Expert: Unassigned)
IPFIX Set IDs	RFC 7011 Standards Action
IPFIX Structured Data Types Semantics	RFC 6313 Standards Action
IPFIX Version Numbers	RFC 7011 Standards Action
IP Multicast Traceroute Facility (Mtrace)
Mtrace2 Forwarding Codes	RFC 8487 Specification Required (Expert: Unassigned)
Mtrace2 TLV Types	RFC 8487 Specification Required (Expert: Unassigned)
IP Version Numbers
IP Version Numbers	RFC 2780 Standards Action
IPS Protocol# (Protocol Number) Field
Protocol# (Protocol Number) Field	RFC 3643 1-239: Standards Action. 240-255: Private Use.
IPSECKEY Resource Record Parameters
Algorithm Type Field	RFC 4025,RFC 9373 IETF Review
Gateway Type Field	RFC 4025 Standards Action
IPv4 Multicast Address Space Registry
AD-HOC Block I (224.0.2.0 - 224.0.255.255)	RFC 5771 Expert Review, IESG Approval, or Standards Action (Expert: Stig Venaas)
AD-HOC Block II (224.3.0.0-224.4.255.255 (224.3/16, 224.4/16))	RFC 5771 Expert Review, IESG Approval, or Standards Action (Expert: Stig Venaas)
AD-HOC Block III (233.252.0.0-233.255.255.255 (233.252/14))	RFC 5771 Expert Review, IESG Approval, or Standards Action (Expert: Stig Venaas)
DIS Transient Groups 224.252.0.0-224.255.255.255 (224.252/14))	RFC 2365 (Expert: Stig Venaas)
GLOP Block	RFC 3180 (Expert: Stig Venaas)
Internetwork Control Block (224.0.1.0 - 224.0.1.255 (224.0.1/24))	RFC 5771 Expert Review, IESG Approval, or Standards Action (Expert: Stig Venaas)
Local Network Control Block (224.0.0.0 - 224.0.0.255 (224.0.0/24))	RFC 5771 Expert Review, IESG Approval, or Standards Action (Expert: Stig Venaas)
Relative Addresses used with Scoped Multicast Addresses	RFC 5771 (Expert: Stig Venaas)
RESERVED (224.1.0.0-224.1.255.255 (224.1/16))	RFC 5771 (Expert: Stig Venaas)
RESERVED (224.5.0.0-224.251.255.255 (251 /16s))	RFC 5771 (Expert: Stig Venaas)
RESERVED (225.0.0.0-231.255.255.255 (7 /8s))	RFC 5771 (Expert: Stig Venaas)
Scoped Multicast Ranges	RFC 5771 (Expert: Stig Venaas)
SDP/SAP Block (224.2.0.0-224.2.255.255 (224.2/16))	RFC 5771 (Expert: Stig Venaas)
Source-Specific Multicast Block (232.0.0.0-232.255.255.255 (232/8))	RFC 5771 (Expert: Stig Venaas)
Unicast-Prefix-based IPv4 Multicast Addresses	RFC 6034 (Expert: Stig Venaas)
IPv6 Low Power Personal Area Network Parameters
Critical 6LoWPAN Routing Header Type	RFC 8138 RFC Required
Dispatch Type Field	RFC 4944,RFC 8025 Specification Required (Expert: Carles Gomez, Shwetha Bhandari, Pascal Thubert (secondary expert))
Elective 6LoWPAN Routing Header Type	RFC 8138 RFC Required
ESC Extension Types	RFC 8066 Specification Required (Expert: Shwetha Bhandari)
LOWPAN_NHC Header Type	RFC 6282 IETF Review
Short Address Fields	RFC 4944 Specification Required (Expert: Carles Gomez)
IPv6 Multicast Address Space Registry
IPv6 Multicast Address Scopes	RFC 7346 IETF Review (Expert: Stig Venaas)
Link-Local Scope Multicast Addresses	RFC 3307 Expert Review (Expert: Stig Venaas)
Node-Local Scope Multicast Addresses	RFC 4291,RFC 3307 Expert Review (Expert: Stig Venaas)
Site-Local Scope Multicast Addresses	RFC 3307 Expert Review (Expert: Stig Venaas)
Unicast-based (Including SSM) Multicast Group IDs	RFC 3307 Addresses in FF3X:0::/32 but not listed below are reserved for future SSMaddress use, but are currently invalid.FF3X:0:0:0:0:0:0:0-FF3X:0:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF (FF3X:0::/32)FF3X:0:0:0:0:0:4000:0-FF3X:0:0:0:0:0:7FFF:FFFF - Expert Review; see registry athttps://www.iana.org/assignments/perm-mcast-groupidsFF3X:0:0:0:0:0:8000:0-FF3X:0:0:0:0:0:FFFF:FFFF - Dynamically allocated by hosts when neededRFC 4607. (Expert: Stig Venaas)
Variable Scope Multicast Addresses	RFC 3307 Expert Review (Expert: Stig Venaas)
IPv6 Over the TSCH Mode of IEEE 802.15.4 (6TiSCH)
6P CellOptions Bitmap	RFC 8480 IETF Review or IESG Approval
6P Command Identifiers	RFC 8480 IETF Review or IESG Approval
6P Message Types	RFC 8480 IETF Review or IESG Approval
6P Return Codes	RFC 8480 IETF Review or IESG Approval
6P Scheduling Function Identifiers	RFC 8480 0-127: IETF Review or IESG Approval. 128-255: Expert Review. (Expert: Xavi Vilajosana Guillen, Thomas Watteyne)
6P Version Numbers	RFC 8480 IETF Review or IESG Approval
Constrained Join Protocol (CoJP) Key Usage	RFC 9031 Integer values less than -65536: Private Use. Integer values from -65536 to -257: Specification Required. Integer values from -256 to 255: Standards Action. Integer values from 256 to 65535: Specification Required. Integer values greater than 65535: Expert Review. (Expert: Mališa Vučinić, Michael Richardson)
Constrained Join Protocol (CoJP) Parameters	RFC 9031 Integer values less than -65536: Private Use. Integer values from -65536 to -257: Specification Required. Integer values from -256 to 255: Standards Action. Integer values from 256 to 65535: Specification Required. Integer values greater than 65535: Expert Review. (Expert: Mališa Vučinić, Michael Richardson)
Constrained Join Protocol (CoJP) Unsupported Configuration Codes	RFC 9031 Integer values less than -65536: Private Use. Integer values from -65536 to -257: Specification Required. Integer values from -256 to 255: Standards Action. Integer values from 256 to 65535: Specification Required. Integer values greater than 65535: Expert Review. (Expert: Mališa Vučinić, Michael Richardson)
IPv6 Router Alert Option Values
IPv6 Router Alert Option Values	RFC 2711 IETF Review
IPv6 Top Level Aggregation Identifier Assignments
Sub-TLA Identifier Assignments	RFC 4147 Registrations no longer accepted
TLA Identifier Assignments	RFC 4147 Registrations no longer accepted
IS-IS
IS-IS Application Identifiers for Generic Information TLV	RFC 6823 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS Authentication Type Codes	RFC 5304 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS Bit Values for Flooding Parameters Flags Sub-TLV	RFC 9681 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS Bit Values for Prefix Attribute Flags Sub-TLV	RFC 7794 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS Group Address Type Codes for GADDR-TLV	RFC 7176 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS Multi-Topology ID Values	RFC 5120 0-3995: Expert Review. 3996-4095: Private Use. (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS Neighbor Link-Attribute Bit Values	RFC 5029,RFC 9667,RFC 9650 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS PDU Registry	RFC 7176 IETF Review
IS-IS SRv6 Adjacency SID Sub-TLVs Flags	RFC 9352 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS SRv6 Capabilities Sub-TLV Flags	RFC 9352 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS SRv6 End SID Sub-TLV Flags	RFC 9352 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS SRv6 Locator TLV Flags	RFC 9352 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS Sub-Sub-TLV Codepoints for Application-Specific Link Attributes	RFC 9479 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS Sub-Sub-TLVs for BIER Info Sub-TLV	RFC 8401 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS Sub-Sub-TLVs for Flexible Algorithm Definition Sub-TLV	RFC 9350 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS Sub-Sub-TLVs for Flood Reflection Discovery Sub-TLV	RFC 9377 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS Sub-Sub-TLVs for SRv6 Capabilities Sub-TLV	RFC 9352 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS Sub-Sub-TLVs for SRv6 SID Sub-TLVs	RFC 9352 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS Sub-TLVs for Application-Specific SRLG TLV	RFC 9479 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS Sub-TLVs for Flooding Parameters TLV	RFC 9681 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS Sub-TLVs for IS-IS Router CAPABILITY TLV	RFC 7981 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS Sub-TLVs for MT-Capability TLV	RFC 6329 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS Sub-TLVs for MT-Port-Cap-TLV	RFC 7176 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS Sub-TLVs for Reverse Metric TLV	RFC 8500 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS Sub-TLVs for Segment Identifier/Label Binding TLVs	RFC 8667 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS Sub-TLVs for the Area Proxy TLV	RFC 9666 Expert Review with RFC Required (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS Sub-TLVs for TLVs Advertising Neighbor Information	RFC 5305,RFC 5316,RFC 7370,RFC 8668 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS Sub-TLVs for TLVs Advertising Prefix Reachability	RFC 5305,RFC 7370,RFC 9352 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
IS-IS Top-Level TLV Codepoints	RFC 3563,RFC 6233,RFC 7356,RFC 8918 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
LSP Flooding Scope Identifier Registry	RFC 7356 Expert Review (Expert: Chris Hopps, Hannes Gredler, Les Ginsberg)
J
Java Message Service (JMS) URI Scheme Variants
JMS URI Scheme Variants	RFC 6167 First Come First Served
JSCalendar
JSCalendar Enum Values	RFC 8984 Expert Review (Expert: Robert Stepanek, Neil Jenkins, Michael Douglass)
JSCalendar Properties	RFC 8984,Internet Draft draft-ietf-jmap-calendars-22 Expert Review (Expert: Robert Stepanek, Neil Jenkins, Michael Douglass)
JSCalendar Types	RFC 8984 Expert Review (Expert: Robert Stepanek, Neil Jenkins, Michael Douglass)
JSContact
JSContact Enum Values	RFC 9553 Major version change required: Standards Action. All other assignments: Specification Required. (Expert: Michael Douglass, Mario Loffredo, Robert Stepanek)
JSContact Properties	RFC 9553 Major version change required: Standards Action. All other assignments: Specification Required. (Expert: Michael Douglass, Mario Loffredo, Robert Stepanek)
JSContact Types	RFC 9553 Major version change required: Standards Action. All other assignments: Specification Required. (Expert: Michael Douglass, Mario Loffredo, Robert Stepanek)
JSContact Version	RFC 9553 Major version change required: Standards Action. All other assignments: Specification Required. (Expert: Michael Douglass, Mario Loffredo, Robert Stepanek)
JSON Meta Application Protocol (JMAP)
JMAP Capabilities	RFC 8620 intended use field is “common" or “placeholder”: Specification Required. all other values: Expert Review. (Expert: Neil Jenkins, Chris Newman, Arnt Gulbrandsen, Joris Baum)
JMAP Data Types	RFC 9404 Specification Required (Expert: Ken Murchison, Neil Jenkins, Arnt Gulbrandsen, Joris Baum)
JMAP Error Codes	RFC 8620 Expert Review (Expert: Neil Jenkins, Chris Newman, Arnt Gulbrandsen, Joris Baum)
JSON Object Signing and Encryption (JOSE)
JSON Web Encryption Compression Algorithms	RFC 7518 Specification Required (Expert: Sean Turner, Mike Jones, Filip Skokan)
JSON Web Key Elliptic Curve	RFC 7518,RFC 7638 Specification Required (Expert: Sean Turner, Mike Jones, Filip Skokan)
JSON Web Key Operations	RFC 7517 Specification Required (Expert: Sean Turner, Mike Jones, Filip Skokan)
JSON Web Key Parameters	RFC 7517,RFC 7638 Specification Required (Expert: Sean Turner, Mike Jones, Filip Skokan)
JSON Web Key Set Parameters	RFC 7517 Specification Required (Expert: Sean Turner, Mike Jones, Filip Skokan)
JSON Web Key Types	RFC 7518,RFC 7638 Specification Required (Expert: Sean Turner, Mike Jones, Filip Skokan)
JSON Web Key Use	RFC 7517 Specification Required (Expert: Sean Turner, Mike Jones, Filip Skokan)
JSON Web Signature and Encryption Algorithms	RFC 7518 Specification Required (Expert: Sean Turner, Mike Jones, Filip Skokan)
JSON Web Signature and Encryption Header Parameters	RFC 7515 Specification Required (Expert: Sean Turner, Mike Jones, Filip Skokan)
JSON Web Token (JWT)
JSON Web Token Claims	RFC 7519 Specification Required (Expert: Brian Campbell, Mike Jones, Nat Sakimura, Filip Skokan)
JWT Confirmation Methods	RFC 7800 Specification Required (Expert: John Bradley, Hannes Tschofenig)
PASSporT RCD Claim Types	Internet Draft draft-ietf-stir-passport-rcd-26 Specification Required (Expert: Unassigned)
PASSporT Resource Priority Header (rph) Types	RFC 8443 Specification Required (Expert: Martin Dolly, Subir Das)
Personal Assertion Token (PASSporT) Extensions	RFC 8225 Specification Required (Expert: Chris Wendt (primary), Russ Housley (secondary))
JSONPath
Function Extensions	RFC 9535 Expert Review (Expert: Glyn Normington)
K
Kerberized Internet Negotiation of Keys (KINK) Parameters
KINK Error Codes	RFC 4430 0-8191: Standards Action or non standards-track RFCs with Expert Review. 8192-16383: Private Use. 16384-4294967295: Reserved. (Expert: Stewart Bryant, Danny McPherson)
KINK Message Types	RFC 4430 1-127: Standards Action or non standards-track RFCs with Expert Review. 128-255: Private Use. (Expert: Shoichi Sakane, Ken'ichi Kamada)
KINK Next Payload Types	RFC 4430 0-127: Standards Action or non standards-track RFCs with Expert Review. 128-255: Private Use. (Expert: Shoichi Sakane, Ken'ichi Kamada)
Kerberos Parameters
FAST Armor Types	RFC 6113 Standards Action
FAST Options	RFC 6113 Standards Action
Kerberos Checksum Type Numbers	RFC 3961 Standards Action for standards-track RFCs; non-standards-track RFCs must be reviewed by an expert. (Expert: Ken Raeburn)
Kerberos Encryption Type Numbers	RFC 3961 Standards Action for standards-track RFCs; non-standards-track RFCs must be reviewed by an expert. (Expert: Ken Raeburn)
Kerberos Message Transport Types	RFC 6784 IETF Review
Kerberos Second Factor Types	RFC 9588 Specification Required (Expert: Simo Sorce, Greg Hudson)
Kerberos SPAKE Groups	RFC 9588 Specification Required (Expert: Simo Sorce, Greg Hudson)
Kerberos TCP Extensions	RFC 5021 0-29: Standards Action or IESG Approval. 30: Reserved.
Pre-authentication and Typed Data	RFC 6113 Expert Review (Expert: Sam Hartman (primary), Larry Zhu (secondary))
Well-Known Kerberos Principal Names	RFC 6111 Specification Required (Expert: Unassigned)
Well-Known Kerberos Realm Names	RFC 6111 Specification Required (Expert: Unassigned)
Kerberos V GSS-API Mechanism Parameters
Kerberos V GSS-API Mechanism Extension Types	RFC 6542 0x00000000 - 0x000003FF: IETF Review. 0x00000400 - 0xFFFFF3FF: Specification Required. (Expert: Unassigned)
Kerberos V GSS-API Token Type Identifiers	RFC 4121,RFC 7055 Expert Review (Expert: Sam Hartman)
Keying and Authentication for Routing Protocols (KARP) Parameters
Cryptographic Protocol ID	RFC 7166 Standards Action
KeyNote Parameters
KeyNote app_domain Identifiers	RFC 2704 First Come First Served
KeyNote Public Key Format Identifiers	RFC 2704 Specification Required (Expert: Unassigned)
KeyNote Signature Algorithm Identifiers	RFC 2704 Specification Required (Expert: Unassigned)
KeyTable
KeyTable AlgIDs	RFC 7210 First Come First Served
KeyTable KDFs	RFC 7210 First Come First Served
KeyTable Protocols	RFC 7210 Specification Required (Expert: Unassigned)
L
Label Distribution Protocol (LDP) Parameters
Experiment ID Name Space	RFC 5036 0x00000000-0xefffffff: First Come First Served. 0xf0000000-0xffffffff: Experiment Ids - Reserved for Private Use.
Forwarding Equivalence Class (FEC) Type Name Space	RFC 5036,RFC 7358 0-127: IETF Review. 128-191: First Come First Served.
LDP MP Opaque Value Element basic type	RFC 6388 Standards Action
LDP MP Opaque Value Element extended type	RFC 6388 0-32767: Standards Action. 32768-65535: First Come First Served.
LDP MP Status Value Element type	RFC 6388 Standards Action
LDP Targeted Application Identifier	RFC 8223 0x0001-0x1FFF: IETF Review. 0x2000-0xF7FF: First Come First Served.
MAC Flush Flags	RFC 7361 Standards Action
Message Type Name Space	RFC 5036 0x0001-0x00FF: IETF Review. 0x0100-0x01FF: IETF Review. 0x0200-0x02FF: IETF Review. 0x0300-0x03FF: IETF Review. 0x0400-0x04FF: IETF Review. 0x0500-0x05FF: IETF Review. 0x0600-0x3DFF: IETF Review. 0x3E00-0x3EFF: LDP Vendor-Private Extensions. 0x3F00-0x3FFF: LDP Experimental Extensions.
Status Code Name Space	RFC 5036 0x00000000-0x1FFFFFFF: IETF Review. 0x20000000-0x3EFFFFFF: First Come First Served. 0x3F000000-0x3FFFFFFF: Private Use.
TLV Type Name Space	RFC 5036 0x0001-0x07FF: IETF Review. 0x0800-0x08FF (CR-LDP): IETF Review. 0x0900-0x3DFF: IETF Review. 0x3E00-0x3EFF: LDP Vendor-Private Extensions. 0x3F00-0x3FFF: LDP Experimental Extensions.
Label Generation Ruleset (LGR) Dispositions
Private Dispositions	RFC 7940 First Come First Served
Standard Dispositions	RFC 7940 Specification Required (Expert: Unassigned)
Language Tags
Language Subtag Registration Form Archive	RFC 5646 See the Language Subtag Registry.
Language Subtag Registry	RFC 5645,RFC 5646 Expert Review (Expert: Michael Everson (primary), Doug Ewell (secondary))
Language Tag Extensions	RFC 5646 IETF Review or IESG Approval
Language Tag Registration Form Archive (OBSOLETE)	RFC 3066,RFC 4646 Registry closed
Language Tags (OBSOLETE)	RFC 3066,RFC 4646 Registry closed
Layer Two Tunneling Protocol "L2TP"
ATM Alarm Status AVP (Attribute Type 88) Values	RFC 4454 Expert Review (Expert: Carlos Pignataro (primary), Ignacio Goyret (secondary))
ATM-Specific Sublayer bits	RFC 4454 IETF Review
Bearer Field definition	RFC 2661 Standards Action
Circuit Status Bits	RFC 3931 IETF Review
Control Message Attribute Value Pairs	RFC 3438 Expert Review (Expert: Carlos Pignataro (primary), Ignacio Goyret (secondary))
Data Sequencing Level	RFC 3931 Expert Review (Expert: Carlos Pignataro (primary), Ignacio Goyret (secondary))
Default L2-Specific Sublayer bits	RFC 3931
Framing Field definition	RFC 2661 Standards Action
L2-Specific Sublayer Type	RFC 3931 Expert Review (Expert: Carlos Pignataro (primary), Ignacio Goyret (secondary))
L2TPv3 Pseudowire Types	RFC 3931 0-32767: Expert Review. 32768-65535: First Come First Served. (Expert: Carlos Pignataro (primary), Ignacio Goyret (secondary))
Leading Bits of the L2TP AVP Header	RFC 2661,RFC 3931 Standards Action
Leading Bits of the L2TP Message Header	RFC 2661,RFC 3931 Standards Action
Message Type AVP (Attribute Type 0) Values	RFC 3438 Expert Review (Expert: Carlos Pignataro (primary), Ignacio Goyret (secondary))
PPP Disconnect Cause Code (Attribute Type 46) Values	RFC 3145
Proxy Authen Type AVP (Attribute Type 29) Values	RFC 2661 First Come First Served
Result Code AVP (Attribute Type 1) Values	RFC 3438 Expert Review (Expert: Carlos Pignataro (primary), Ignacio Goyret (secondary))
Service Category AVP (Attribute Type 42) Flag Field	RFC 3301 Specification Required (Expert: Carlos Pignataro (primary), Ignacio Goyret (secondary))
VCCV Capability AVP (Attribute Type 96) Values	RFC 5085 IETF Review
Layered Coding Transport (LCT) Header Extension Types
LCT Header Extension Types	RFC 5651 0-63: IETF Review. 64-127: Specification Required. 128-191: IETF Review. 192-255: Specification Required. (Expert: Vincent Roca)
Level of Assurance (LoA) Profiles
Level of Assurance Profiles	RFC 6711 Expert Review (Expert: John Bradley, Joni Brennan, Leif Johansson)
Licklider Transmission Protocol (LTP) Parameters
LTP Cancel Segment Reason Codes	RFC 7116 Specification Required (Expert: Unassigned)
LTP Ciphersuites	RFC 5327 Specification Required (Expert: Unassigned)
LTP Client Service Identifiers	RFC 7116 Specification Required (Expert: Unassigned)
LTP Engine Numbers	RFC 7116 1-16383: Expert Review. 268435456-4398046511103: First Come First Served for requests of up to 16384 values. Larger requests require Expert Review.. (Expert: Unassigned)
LTP Extension Tags	RFC 5326 Specification Required (Expert: Unassigned)
Lightweight Directory Access Protocol (LDAP) - pcimSchema Descriptors
pcimSchema LDAP Descriptors	RFC 3703 TBD
Lightweight Directory Access Protocol (LDAP) Parameters
Attribute Description Options	RFC 4520 x- Private Use (can not be registered)e- Reserved for Experiments, First Come First ServedAll others: Standards Action or Expert Review with Specification (Expert: Rolf Sonneveld, Andrew Findlay)
Bind Authentication Method	RFC 4520 0-1023 Standards Action (can not start with e- or x-)1024-4095 Expert Review with Specification Required (can not start with e- or x-)4096-16383 First Come First Served (Shall start with e-)16384 and higher Private Use (Shall start with x-) (Expert: Rolf Sonneveld, Andrew Findlay)
Internet Directory Numbers (iso.org.dod.internet.directory [1.3.6.1.1.])	RFC 4520,RFC 2578 Specification Required (Expert: Rolf Sonneveld, Andrew Findlay)
LDAP authzid prefixes	RFC 4520 x- Private Usee- Reserved for Experiments, First Come First ServedAll others, Standards Action or Expert Review with Specification Required (Expert: Rolf Sonneveld, Andrew Findlay)
LDAP Filter Choices	RFC 4520 Standards Action
LDAP ModifyRequest Operations	RFC 4520 0-1023 Standards Action (can not start with e- or x-)1024-4095 Expert Review with Specification Required (can not start with e- or x-)4096-16383 First Come First Served (Shall start with e-)16384 and higher Private Use (Shall start with x-) (Expert: Rolf Sonneveld, Andrew Findlay)
LDAP Search Scopes	RFC 4520 0-1023 Standards Action (can not start with e- or x-)1024-4095 Expert Review with Specification Required (can not start with e- or x-)4096-16383 First Come First Served (Shall start with e-)16384 and higher Private Use (Shall start with x-) (Expert: Rolf Sonneveld, Andrew Findlay)
LDAP Syntaxes	RFC 4520 First Come First Served
LDAPMessage types	RFC 4520 Standards Action
Object Identifier Descriptors	RFC 4520 x- Private Use (can not be registered)e- Reserved for Experiments, First Come First ServedAll others: Expert Review (Expert: Rolf Sonneveld, Andrew Findlay)
Protocol Mechanisms	RFC 4520 First Come First Served
resultCode values	RFC 4520 0-1023 Standards Action (can not start with e- or x-)1024-4095 Expert Review with Specification Required (can not start with e- or x-)4096-16383 First Come First Served (Shall start with e-)16384 and higher Private Use (Shall start with x-) (Expert: Rolf Sonneveld, Andrew Findlay)
Link Management Protocol (LMP) Parameters
LMP Behavior Configuration Flags	RFC 6898 Standards Action
LMP Message Type Name Space	RFC 4204 0-127: Standards Action. 128-247: Expert Review. (Expert: Dimitri Papadimitriou)
LMP Object Class name space and Class type (C-Type)	RFC 4204 0-127: Standards Action. 128-247: Expert Review. (Expert: Dimitri Papadimitriou)
Link Relations
Link Relation Types	RFC 8288 Specification Required (Expert: Mark Nottingham, Julian Reschke, Jan Algermissen)
Link State Routing TE Capabilities
TE Node Capabilities	RFC 5073 IETF Review
Locally-Served DNS Zones
IPv4 Locally-Served DNS Zone Registry	RFC 6303 IETF Review
IPv6 Locally-Served DNS Zone Registry	RFC 6303 IETF Review
service.arpa Subdomain	Internet Draft draft-ietf-dnssd-srp-25 Standards Action or IESG Approval
Transport-Independent Locally-Served DNS Zone Registry	RFC 8375 IETF Review
Location-to-Service Translation (LoST) Location Profiles
LoST Location Profiles	RFC 5222,RFC 9036 Specification Required (Expert: Henning Schulzrinne)
Locator/ID Separation Protocol (LISP) Parameters
LISP ACT Values	RFC 9301 IETF Review or IESG Approval
LISP Address Type Codes (CLOSED)	RFC 6830,RFC 9301
LISP Algorithm ID Numbers	RFC 9301 First Come First Served
LISP Canonical Address Format (LCAF) Types	RFC 8060 Specification Required (Expert: Luigi Iannone, Albert Cabellos)
LISP Control Plane Header Bits: EID-Record	RFC 9301 Specification Required (Expert: Albert Cabellos, Dino Farinacci)
LISP Control Plane Header Bits: Encapsulated Control Message (ECM)	RFC 9301 Specification Required (Expert: Albert Cabellos, Dino Farinacci)
LISP Control Plane Header Bits: Map-Register	RFC 9301 Specification Required (Expert: Albert Cabellos, Dino Farinacci)
LISP Control Plane Header Bits: Map-Reply	RFC 9301 Specification Required (Expert: Albert Cabellos, Dino Farinacci)
LISP Control Plane Header Bits: Map-Request	RFC 9301 Specification Required (Expert: Albert Cabellos, Dino Farinacci)
LISP Control Plane Header Bits: Map-Request-Record	RFC 9437 Specification Required (Expert: Albert Cabellos, Dino Farinacci)
LISP Control Plane Header Bits: RLOC-Record	RFC 9301 Specification Required (Expert: Albert Cabellos, Dino Farinacci)
LISP Crypto Cipher Suite	RFC 8061 First Come First Served
LISP ECM Authentication Data Types	RFC 9303 Specification Required (Expert: Damien Saucez, Luigi Iannone)
LISP Map-Reply Authentication Data Types	RFC 9303 Specification Required (Expert: Damien Saucez, Luigi Iannone)
LISP Packet Types	RFC 9304,RFC 9301 Standards Action
LISP Shared Extension Message Type Sub-types	RFC 9304 0-1023: Standards Action. 1024-4095: First Come First Served.
LISP-GPE Next Protocol	RFC 9305 Specification Required (Expert: Darrel Lewis, Luigi Iannone)
LISP-SEC Authentication Data Key Derivation Function IDs	RFC 9303 Specification Required (Expert: Damien Saucez, Luigi Iannone)
LISP-SEC Authentication Data Key Wrap IDs	RFC 9303 Specification Required (Expert: Damien Saucez, Luigi Iannone)
LISP-SEC Preferred Authentication Data HMAC IDs	RFC 9303 Specification Required (Expert: Damien Saucez, Luigi Iannone)
M
Machine Names
Machine Names	Not defined
"Magic Numbers" for ISAKMP Protocol
IPSEC AH Transform Identifiers	RFC 2407,RFC 9395 Registry closed
IPSEC ESP Transform Identifiers	RFC 2407,RFC 9395 Registry closed
IPSEC Identification Type	RFC 2407,RFC 9395 Registry closed
IPSEC IPCOMP Transform Identifiers	RFC 2407,RFC 9395 Registry closed
IPSEC ISAKMP Transform Identifiers	RFC 2407,RFC 9395 Registry closed
IPSEC Labeled Domain Identifiers	RFC 2407,RFC 9395 Registry closed
IPSEC Notify Message Types	RFC 2407,RFC 9395 Registry closed
IPSEC Security Association Attributes	RFC 2407,RFC 9395 Registry closed
IPSEC Security Protocol Identifiers	RFC 2407,RFC 9395 Registry closed
IPSEC Situation Definition	RFC 2407,RFC 9395 Registry closed
Mail Parameters
Address Literal Tags	RFC 5321 Standards Action
Encoding Header Field Keywords	RFC 1505 Specification Required (Expert: Unassigned)
Mail Header Confidentiality Policies	Internet Draft draft-ietf-lamps-header-protection-25 Specification Required or IETF Review (see Note) (Expert: Unassigned)
Mail Transmission Types	RFC 821,RFC 822,RFC 5321 Standards Action or IESG-Approved Experimental RFC
Multicast Email SMTP Extensions	RFC 8494 Specification Required (Expert: Alexey Melnikov (primary), RFC Independent Submissions Editor (secondary))
Registered-states	RFC 6729 First Come First Served
SMTP PRIORITY extension Priority Assignment Policy	RFC 6710 Specification Required (Expert: Unassigned)
SMTP Server Limits	RFC 9422 Specification Required (Expert: John Klensin, Murray Kucherawy (backup))
SMTP Service Extensions	RFC 5321 Standards Action or IESG-Approved Experimental RFC
Manufacturer Usage Description (MUD)
MUD Extensions	RFC 8520 Standards Action
MUD Well-Known Uniform Resource Name (URN)	RFC 8520 Expert Review (Expert: Eliot Lear, Dan Romascanu)
Matroska
Matroska AES Cipher Modes	RFC 9559 First Come First Served
Matroska Alpha Modes	RFC 9559 First Come First Served
Matroska Chapter Codec IDs	RFC 9559 Specification Required (Expert: Dave Rice, Steve Lhomme)
Matroska Color Ranges	RFC 9559 Specification Required (Expert: Dave Rice, Steve Lhomme)
Matroska Compression Algorithms	RFC 9559 Specification Required (Expert: Dave Rice, Steve Lhomme)
Matroska Content Encoding Scopes	RFC 9559 Specification Required (Expert: Dave Rice, Steve Lhomme)
Matroska Content Encoding Types	RFC 9559 Specification Required (Expert: Dave Rice, Steve Lhomme)
Matroska Display Units	RFC 9559 Specification Required (Expert: Dave Rice, Steve Lhomme)
Matroska Element IDs	RFC 9559 0x80-0xFE: RFC Required. 0x407F-0x7FFE: Specification Required. 0x203FFF-0x3FFFFE: First Come First Served. 0x101FFFFF-0x1FFFFFFE: First Come First Served. (Expert: Dave Rice, Steve Lhomme)
Matroska Encryption Algorithms	RFC 9559 First Come First Served
Matroska Horizontal Chroma Sitings	RFC 9559 First Come First Served
Matroska Projection Types	RFC 9559 First Come First Served
Matroska Stereo Modes	RFC 9559 Specification Required (Expert: Dave Rice, Steve Lhomme)
Matroska Tags Target Types	RFC 9559 Specification Required (Expert: Dave Rice, Steve Lhomme)
Matroska Track Plane Types	RFC 9559 First Come First Served
Matroska Track Types	RFC 9559 Specification Required (Expert: Dave Rice, Steve Lhomme)
Matroska Vertical Chroma Sitings	RFC 9559 First Come First Served
Maximally Redundant Tree (MRT) Parameters
MRT Profile Identifier Registry	RFC 7812 Standards Action
Media Control Channel Framework Parameters
Control Packages	RFC 6230 RFC Required
Header Fields	RFC 6230 RFC Required
IVR Prompt Variable Type for Control Packages	RFC 6231 RFC Required
MEDIACTRL Interactive Voice Response Control Package Status Codes	RFC 6623 Standards Action
Method Names	RFC 6230 RFC Required
Mixer Control Package Status Code Registration	RFC 6505 Standards Action
Status Codes	RFC 6230 RFC Required
Media Feature Tags - iso.org.dod.internet.features (1.3.6.1.8)
iso.org.dod.internet.features.global-tree (1.3.6.1.8.2)	RFC 2506 Expert Review (Expert: Paul Kyzivat)
iso.org.dod.internet.features.ietf-tree (1.3.6.1.8.1)	RFC 2506,RFC 2534 IETF Review
iso.org.dod.internet.features.sip-tree (1.3.6.1.8.4)	RFC 3840 IETF Review
iso.org.dod.internet.features.uri-tree (1.3.6.1.8.3)	RFC 2506 Unregistered (formed from uri)
Media Gateway Control Protocol (MGCP)
List of Extension Digit Map Letters	RFC 3660 Expert Review (Expert: Brian Rosen)
LocalConnectionOptions Sub-registry	RFC 3435 Expert Review (Expert: Brian Rosen)
MGCP Package Sub-Registry	RFC 3435 Expert Review (Expert: Brian Rosen)
Media Independent Handover (MIH)
MIH Table of Mappings From Service Field Values to Transport Protocols	RFC 5679 Standards Action
Media Resource Control Protocol Version 2 (MRCPv2) Parameters
Grammar Reference List Parameters	RFC 6787 Specification Required (Expert: Unassigned)
MRCPv2 Header Fields	RFC 6787 Standards Action
MRCPv2 Methods and Events	RFC 6787 Standards Action
MRCPv2 Resource Types	RFC 6787 Standards Action
MRCPv2 Status Codes	RFC 6787 Specification Required (Expert: Unassigned)
MRCPv2 Vendor-Specific Parameters	RFC 6787 First Come First Served
Megaco/H.248 Packages
Error Codes	RFC 5125,RFC 5615 Expert Review (Expert: Unassigned)
Private packages (0x8000 to 0xffff)	RFC 5125,RFC 5615 Expert Review (Expert: Unassigned)
Profile Names	RFC 5125,RFC 5615 Expert Review (Expert: Unassigned)
Public Packages (0x0001-0x7fff)	RFC 5125 Expert Review or IETF Review (Expert: Unassigned)
ServiceChange Reasons	RFC 5125,RFC 5615 Expert Review (Expert: Unassigned)
Message Disposition Notification (MDN) Parameters
MDN-Disposition-modifier-names	RFC 8098 Specification Required (Expert: Tony Hansen)
MDN-Disposition-notification-option-names	RFC 8098 Specification Required (Expert: Unassigned)
MDN-Extension-field-names	RFC 8098 Specification Required (Expert: Unassigned)
Message Headers
Content-Translation-Type Header Field Values	RFC 8255 Specification Required (Expert: Nik Tomkinson)
Permanent Message Header Field Names	RFC 3864,Internet Draft draft-ietf-emailcore-rfc5322bis-12 Expert Review (Expert: Graham Klyne)
Provisional Message Header Field Names	RFC 3864,Internet Draft draft-ietf-emailcore-rfc5322bis-12 Expert Review (Expert: Graham Klyne)
Message Session Relay Protocol (MSRP) Parameters
Header Fields	RFC 4975 RFC Required
Methods	RFC 4975 RFC Required
Status Codes	RFC 4975 RFC Required
Message Tracking Query Protocol (MTQP) Options Registry
MTQP Options	RFC 3887 Options whose names do not begin with "vnd.": Standards Action or IESG-approved experimental RFC. Options with "vnd.": First Come First Served.
Messaging Abuse Reporting Format (MARF) Parameters
Feedback Report Header Fields	RFC 5965 Specification Required (Expert: Scott Kitterman, Murray Kucherawy)
Feedback Report Type Values	RFC 5965 Specification Required (Expert: Scott Kitterman, Murray Kucherawy)
Messaging Layer Security (MLS)
MLS Cipher Suites	RFC 9420 Specification Required (Expert: Sean Turner, Raphael Robert, Richard Barnes)
MLS Credential Types	RFC 9420 Specification Required (Expert: Sean Turner, Raphael Robert, Richard Barnes)
MLS Exporter Labels	RFC 9420 Specification Required (Expert: Sean Turner, Raphael Robert, Richard Barnes)
MLS Extension Types	RFC 9420 Specification Required (Expert: Sean Turner, Raphael Robert, Richard Barnes)
MLS Proposal Types	RFC 9420 Specification Required (Expert: Sean Turner, Raphael Robert, Richard Barnes)
MLS Public Key Encryption Labels	RFC 9420 Specification Required (Expert: Sean Turner, Raphael Robert, Richard Barnes)
MLS Signature Labels	RFC 9420 Specification Required (Expert: Sean Turner, Raphael Robert, Richard Barnes)
MLS Wire Formats	RFC 9420 Specification Required (Expert: Sean Turner, Raphael Robert, Richard Barnes)
Milnet Parameters - Registry closed
Milnet Link Numbers	Registry closed
Milnet Logical Addresses	Registry closed
Milnet X.25 Address Mappings	Registry closed
Mobile Ad hoc NETwork (MANET) Parameters
Address Block TLV Types	RFC 5444,RFC 7631,RFC 8245 0-127: Expert Review. 128-223: Expert Review. 224-255: Reserved for Experimental Use. (Expert: Joe Macker)
Cryptographic Functions	RFC 7182 Expert Review (Expert: Joe Macker)
Hash Functions	RFC 7182 Expert Review (Expert: Joe Macker)
HELLO Message-Type-specific Address Block TLV Types	RFC 6130 0-127: Reserved. 128-223: Expert Review. 224-255: Reserved. (Expert: Joe Macker)
HELLO Message-Type-specific Message TLV Types	RFC 6130 0-127: Reserved. 128-223: Expert Review. 224-255: Reserved. (Expert: Joe Macker)
ICV Address Block TLV Type Extensions	RFC 7182 Expert Review (Expert: Joe Macker)
ICV Message TLV Type Extensions	RFC 7182 Expert Review (Expert: Joe Macker)
ICV Packet TLV Type Extensions	RFC 7182 Expert Review (Expert: Joe Macker)
LINK_METRIC Address Block TLV Type Extensions	RFC 7181 Expert Review (Expert: Joe Macker)
LINK_STATUS TLV Values	RFC 7188 Expert Review (Expert: Joe Macker)
LOCAL_IF TLV Values	RFC 7188 Expert Review (Expert: Joe Macker)
Message TLV Types	RFC 5444,RFC 7631,RFC 8245 0-127: Expert Review. 128-223: Expert Review. 224-255: Reserved for Experimental Use. (Expert: Joe Macker)
Message Types	RFC 5444,RFC 8245 Expert Review (Expert: Joe Macker)
MPR TLV BIT Values	RFC 7188 Expert Review (Expert: Joe Macker)
NBR_ADDR_TYPE Address Block TLV Bit Values	RFC 7188 Expert Review (Expert: Joe Macker)
OTHER_NEIGHB TLV Values	RFC 7188 Expert Review (Expert: Joe Macker)
Packet TLV Types	RFC 5444,RFC 8245 Expert Review (Expert: Joe Macker)
SMF Relay Algorithm IDs	RFC 6621 Expert Review (Expert: Joe Macker)
SMF_NBR_TYPE Address Block TLV Type Extensions	RFC 6621 Expert Review (Expert: Joe Macker)
SMF_TYPE Message TLV Type Extensions	RFC 6621 Expert Review (Expert: Joe Macker)
TC Message-Type-specific Address Block TLV Types	RFC 7181 0-127: Reserved. 128-223: Expert Review. 224-255: Reserved. (Expert: Joe Macker)
TC Message-Type-specific Message TLV Types	RFC 7181 0-127: Reserved. 128-223: Expert Review. 224-255: Reserved. (Expert: Joe Macker)
TIMESTAMP Address Block TLV Type Extensions	RFC 7182 Expert Review (Expert: Joe Macker)
TIMESTAMP Message TLV Type Extensions	RFC 7182 Expert Review (Expert: Joe Macker)
TIMESTAMP Packet TLV Type Extensions	RFC 7182 Expert Review (Expert: Joe Macker)
Type 0 Address Block TLV Type Extensions	RFC 5497,RFC 7631 Expert Review (Expert: Joe Macker)
Type 0 Message TLV Type Extensions	RFC 5497,RFC 7631 Expert Review (Expert: Joe Macker)
Type 1 Address Block TLV Type Extensions	RFC 5497,RFC 7631 Expert Review (Expert: Joe Macker)
Type 1 Message TLV Type Extensions	RFC 5497,RFC 7631 Expert Review (Expert: Joe Macker)
Type 10 Address Block TLV Type Extensions	RFC 7181,RFC 7631 Expert Review (Expert: Joe Macker)
Type 2 Address Block TLV Type Extensions	RFC 6130,RFC 7631 Expert Review (Expert: Joe Macker)
Type 3 Address Block TLV Type Extensions	RFC 6130,RFC 7631 Expert Review (Expert: Joe Macker)
Type 4 Address Block TLV Type Extensions	RFC 6130,RFC 7631 Expert Review (Expert: Joe Macker)
Type 7 Message TLV Type Extensions	RFC 7181,RFC 7631 Expert Review (Expert: Joe Macker)
Type 8 Address Block TLV Type Extensions	RFC 7181,RFC 7631 Expert Review (Expert: Joe Macker)
Type 8 Message TLV Type Extensions	RFC 7181,RFC 7631 Expert Review (Expert: Joe Macker)
Type 9 Address Block TLV Type Extensions	RFC 7181,RFC 7631 Expert Review (Expert: Joe Macker)
Mobile IPv4 Numbers
Access Technology Types	RFC 5563 Expert Review (Expert: Unassigned)
Code Values for General Notification Messages	RFC 6098 0: Expert Review. 1-63: Expert Review. 64-69: Expert Review. 70-127: Expert Review. 128-133: Expert Review. 134-191: Expert Review. 192-197: Expert Review. 198-255: Expert Review. (Expert: Unassigned)
Code Values for Mobile IP Handoff Reply Messages (Value 17)	RFC 4881 IETF Review
Code Values for Mobile IP Registration Reply Messages	RFC 5944,RFC 6521 (Expert: Unassigned)
Dual Stack (DSMIPv4) Extension subtypes (Value 152)	RFC 5454 Expert Review (Expert: Unassigned)
Extension Subtypes
Extensions to Mobile IP Registration Messages	RFC 5944,RFC 6098 Specification Required (Expert: Unassigned)
Generalized Link Layer Address Registration Extension Subtypes and Generalized Link Layer Address Advertisement Extension Subtypes	RFC 4881 IETF Review
IPv6 Prefix Reply Extension Codes	RFC 5454 Expert Review (Expert: Unassigned)
Message String Extension (Value 145)	RFC 4917 Expert Review (Expert: Unassigned)
Mobile IP Extensions for ICMP Router Discovery messages	RFC 5944 Specification Required (Expert: Unassigned)
Mobile IP Message Types	RFC 5944 Specification Required (Expert: Unassigned)
Mobile Network Acknowledgement Extension	RFC 5177 Standards Action or IESG Approval
Mobile Router Route Optimization Capability Extension (Value 153)	RFC 6521 RFC Required
PMIPv4 Device ID Types	RFC 5563 Expert Review (Expert: Unassigned)
PMIPv4 Non-skippable Extension (Value 47)	RFC 5563 Expert Review (Expert: Unassigned)
PMIPv4 Per-Node Authentication Method Types	RFC 5563 Expert Review (Expert: Unassigned)
PMIPv4 Skippable Extension (Value 147)	RFC 5563 Expert Review (Expert: Unassigned)
PMIPv4 Subscriber ID Types	RFC 5563 Expert Review (Expert: Unassigned)
Replay Method Identifier	RFC 3957 Expert Review (Expert: Unassigned)
Route Optimization Data Extension (Value 50)	RFC 6521 RFC Required
Route Optimization Extension (Value 49)	RFC 6521 RFC Required
Security Parameter Index (SPI) Values for the Mobile IP Reserved SPIs	RFC 4721 Must be specified and approved by the MIP4 working group
Mobile IPv6
Access Network Information (ANI) Sub-Option Type Values	RFC 6757 Expert Review (Expert: Jouni Korhonen, Sri Gundavelli)
Access Technology Type Option Type Values	RFC 5213 Expert Review (Expert: Sri Gundavelli, Jouni Korhonen)
Binding Acknowledgment Flags	RFC 5213 Standards Action or IESG Approval
Binding Revocation Acknowledgement Status Codes	RFC 5846 Standards Action or IESG Approval
Binding Revocation Type	RFC 5846 Standards Action or IESG Approval
Binding Update Flags	RFC 5213 Standards Action or IESG Approval
DSMIP6-TLS Packet Types Registry	RFC 6618 RFC Required
Dual Stack MIPv6 (DSMIPv6) IPv4 Home Address Option Status Codes	RFC 5555 IETF Review
Enumerating Algorithms	RFC 4285 IETF Review
Flow Binding Acknowledgement Status Codes	RFC 7109 RFC Required
Flow Binding Action Values	RFC 7109 RFC Required
Flow Binding Indication Triggers	RFC 7109 RFC Required
Flow Binding Type	RFC 7109 RFC Required
Flow Identification Mobility Option Status Codes	RFC 6089 Standards Action or IESG Approval
Flow Identification Sub-Options	RFC 6089 Standards Action or IESG Approval
Handoff Indicator Option Type Values	RFC 5213 Expert Review (Expert: Sri Gundavelli, Jouni Korhonen)
Handover Acknowledge Flags	RFC 5949 Standards Action or IESG Approval
Handover Acknowledge Status Codes	RFC 5949 Standards Action or IESG Approval
Handover Initiate Flags	RFC 5949 Standards Action or IESG Approval
Handover Initiate Status Codes	RFC 5949 Standards Action or IESG Approval
IPv4 DHCP Support Mode Flags	RFC 5844 Expert Review (Expert: Sri Gundavelli, Jouni Korhonen)
IPv4 Home Address Reply Status Codes	RFC 5844 Expert Review (Expert: Sri Gundavelli, Jouni Korhonen)
LMA-Controlled MAG Parameters Sub-Option Type Values	RFC 8127 Expert Review (Expert: Dhananjay Patki, Lyle Bertz)
Mobile Node Group Identifier Type Registry	RFC 6602 Expert Review (Expert: Unassigned)
Mobile Node Identifier Option Subtypes	RFC 4283 Standards Action
Mobility Header Types - for the MH Type field in the Mobility Header	RFC 6275 Standards Action or IESG Approval
Mobility Options	RFC 6275 Standards Action or IESG Approval
Operator-Identifier Type Registry	RFC 6757 Expert Review (Expert: Unassigned)
Pseudo Home Address Acknowledgement Status Codes	RFC 5726 RFC Required
Quality-of-Service Attribute Registry	RFC 7222 Specification Required (Expert: Jouni Korhonen, Sri Gundavelli)
Revocation Trigger Values	RFC 5846 Standards Action or IESG Approval
Status Codes	RFC 6275,RFC 5213 Standards Action or IESG Approval
Status Codes (DNS Update Mobility Option)	RFC 5026 Standards Action or IESG Approval
Subtype Field of the MN-HA and MN-AAA Authentication Mobility Options	RFC 4285 IETF Review
Traffic Selector Format	RFC 6089 Standards Action or IESG Approval
Update Notification Acknowledgement Status Registry	RFC 7077 Specification Required (Expert: Sri Gundavelli, Marco Liebsch)
Update Notification Reasons Registry	RFC 7077 Specification Required (Expert: Sri Gundavelli, Marco Liebsch)
Multi-threaded Routing Toolkit (MRT)
Subtype Codes	RFC 6396 New Subtype Code definitions must reference an existing Type Code to which the Subtype belongs. Subtype assignments follow the assignment rules for the Type Codes to which they belong.
Type Codes	RFC 6396 65-511: IETF Review. 512-2047: Specification Required. 2048-64511: First Come First Served. (Expert: Unassigned)
Multicast Acquisition
Multicast Acquisition Method Registry	RFC 6332 Specification Required (Expert: Unassigned)
Multicast Acquisition Report Block TLV Space Registry	RFC 6332 Specification Required (Expert: Unassigned)
Multicast Acquisition Status Code Space Registry	RFC 6332 Specification Required (Expert: Unassigned)
Multicast Address Dynamic Client Allocation Protocol (MADCAP) Parameters
MADCAP Error Codes	RFC 2730 IETF Review
MADCAP Feature Codes	RFC 2730 IETF Review
MADCAP Lease Identifier Types	RFC 2730 IETF Review
MADCAP Message Types	RFC 2730 IETF Review
MADCAP Options	RFC 2730 IETF Review
Multicast Address-Set Claim (MASC) Parameters
MASC Message Types	RFC 2909 IETF Review
MASC NOTIFICATION Message Error Codes and Subcodes	RFC 2909 IETF Review
MASC OPEN Message Optional Parameter Types	RFC 2909 IETF Review
MASC UPDATE Message Attribute Types	RFC 2909 IETF Review
MASC UPDATE Message Optional Parameter Types (128-255)	RFC 2909 IETF Review
Notification Error Subcodes	RFC 2909 IETF Review
Multicast Ping Protocol Parameters
Multicast Ping Protocol Message Types	RFC 6450 Specification Required (Expert: Unassigned)
Multicast Ping Protocol Option Types	RFC 6450 Specification Required (Expert: Unassigned)
Multicast Source Discovery Protocol (MSDP) TLV Values Registry
MSDP TLV Values	RFC 3618 1-200: Standards Action or IESG Approval. 201-255: Experimental Use.
Multimedia Internet KEYing (MIKEY) Payload Name Spaces
Cert Hash Payload Field Names	RFC 3830,RFC 6309 IETF Review or IESG Approval
Common Header Payload Field Names	RFC 3830,RFC 6309 IETF Review or IESG Approval
DH Data Payload Field Names	RFC 3830,RFC 6309 IETF Review or IESG Approval
ECC Curve	RFC 6267 Specification Required (Expert: Daniel Migault)
Envelope Data Payload Field Names	RFC 3830,RFC 6309 IETF Review or IESG Approval
Error Payload Name Spaces	RFC 3830,RFC 6309 IETF Review or IESG Approval
General Extensions Payload Field Names	RFC 3830,RFC 6309 IETF Review or IESG Approval
ID Payload and Certificate Field Names	RFC 3830,RFC 6309 IETF Review or IESG Approval
ID Role	RFC 6043 Specification Required (Expert: Daniel Migault)
ID Scheme	RFC 6509 Specification Required (Expert: Daniel Migault)
Key Data Payload Field Names	RFC 3830,RFC 6309 IETF Review or IESG Approval
Key Data Transport Payload Field Names	RFC 3830,RFC 6309 IETF Review or IESG Approval
MIKEY Security Protocol Parameters	RFC 3830,RFC 6309 IETF Review or IESG Approval
RAND Role	RFC 6043 Specification Required (Expert: Daniel Migault)
SAKKE params	RFC 6509 Specification Required (Expert: Daniel Migault)
Security Policy Payload Field Names	RFC 3830,RFC 6309 IETF Review or IESG Approval
Signature Payload Field Names	RFC 3830,RFC 6309 IETF Review or IESG Approval
SK sub-payload	RFC 6267 Specification Required (Expert: Daniel Migault)
Ticket Type	RFC 6043 Specification Required (Expert: Daniel Migault)
Timestamp Payload Field Names	RFC 3830,RFC 6309 IETF Review or IESG Approval
TS Role	RFC 6043 Specification Required (Expert: Daniel Migault)
Multiplexed Application Substrate over QUIC Encryption (MASQUE)
HTTP Capsule Types	RFC 9297 provisional: Expert Review. Date field update for provisional registrations: First Come First Served. permanent, 0x00-0x3f: Standards Action or IESG Approval. permanent, greater than 0x3f: Specification Required. first unassigned codepoint: Standards Action. values 0x29 * N + 0x17 (for integer values of N): Reserved. (Expert: Lucas Pardue, David Schinazi)
HTTP Capsule Types	RFC 9297
MASQUE URI Suffixes	RFC 9484 Expert Review (Expert: Tommy Pauly, Magnus Westerlund)
Multiprotocol Label Switching Architecture (MPLS)
Adjacency Type in the IGP-Adjacency Segment ID	RFC 8287 0-250: Standards Action. 251-254: Experimental Use.
Base Special-Purpose MPLS Label Values	RFC 3032,RFC 7274,RFC 9017 Standards Action
CC/CV MEP-ID TLV Registry	RFC 6428,RFC 7214 Standards Action
Downstream Detailed Mapping Address Type Registry	RFC 6426,RFC 7555,RFC 8029 Standards Action
DS Flags	RFC 8029 Standards Action
Extended Special-Purpose MPLS Label Values	RFC 7274 Standards Action
G-ACh Advertisement Protocol Application Registry	RFC 7212,RFC 7214 IETF Review
G-ACh Advertisement Protocol: Ethernet Interface Parameters	RFC 7213,RFC 7214 IETF Review or IESG Approval
G-ACh Advertisement Protocol: GAP TLV Objects (Application ID 0)	RFC 7212,RFC 7214 IETF Review
Global Flags	RFC 6425 Standards Action
Information Field and Protocol Identifier in the Q.2941 Generic Identifier	RFC 3033 0x10-0xFD: IETF Review.
Interface and Label Stack and Detailed Interface and Label Stack Address Types	RFC 8029,RFC 8611 1-250: Standards Action. 251-254: Experimental Use.
Interface Index Flags	RFC 8611 Standards Action
Loss/Delay Measurement Control Code: Query Codes	RFC 6374,RFC 7214 IETF Review
Loss/Delay Measurement Control Code: Response Codes	RFC 6374,RFC 7214 IETF Review
LSR Capability Flags	RFC 8611 Standards Action
Measurement Timestamp Type	RFC 6374,RFC 7214 IETF Review
Message Types	RFC 8029,RFC 9041 0-191: Standards Action. 192-247: RFC Required. 248-251: Experimental Use. 252-255: Private Use.
MPLS Fault OAM Flag Registry	RFC 6427,RFC 7214 Standards Action
MPLS Fault OAM Message Type Registry	RFC 6427,RFC 7214 Standards Action
MPLS Fault OAM TLV Registry	RFC 6427,RFC 7214 0-191: Standards Action. 192-247: Specification Required. (Expert: Unassigned)
MPLS Generalized Associated Channel (G-ACh) Types (including Pseudowire Associated Channel Types)	RFC 4385,RFC 5586,RFC 7026,RFC 7214 IETF Review
MPLS Loss/Delay Measurement TLV Object	RFC 6374,RFC 7214 IETF Review
MPLS Multi-Topology Identifiers	RFC 7307,RFC 8320 Standards Action
MPLS OAM Function Flags	RFC 7759 Standards Action
MPLS PSC Capability Flag Registry	RFC 7271 Standards Action
MPLS PSC Request Registry	RFC 6378,RFC 7214 Standards Action
MPLS PSC TLV Registry	RFC 6378,RFC 7214 IETF Review
MPLS RPS Request Code Registry	RFC 8227 Specification Required (Expert: Weiqiang Cheng, Jie Dong)
MPLS RTM TLV Registry	RFC 8169 0-127: IETF Review. 128-191: First Come First Served.
MPLS-TP DHC TLVs	RFC 8185 IETF Review
Multipath Types	RFC 8029 0-250: Standards Action. 251-254: Experimental Use. Standards Action
Next Hop Address Type Registry	RFC 7555 Standards Action
Pad Types	RFC 8029 1-250: Standards Action. 251-254: Experimental Use.
Protocol in Label Stack Sub-TLV of Downstream Detailed Mapping TLV	RFC 8287 0-250: Standards Action. 251-254: Experimental Use.
Protocol in the Segment ID Sub-TLV	RFC 8287 0-250: Standards Action. 251-254: Experimental Use.
Proxy Flags	RFC 7555 Standards Action
Q.2957 User-to-user Signaling for the Internet Protocol	RFC 3033 0x03-0xFD: IETF Review.
Reply Modes	RFC 8029,RFC 9041 0-191: Standards Action. 192-247: RFC Required. 248-251: Experimental Use. 252-255: Private Use.
Reply Path Return Codes	RFC 7110 0x0000-0xFFFB: Standards Action. 0xFFFC-0xFFFF: Experimental Use.
Return Codes	RFC 8029,RFC 9041 0-191: Standards Action. 192-247: RFC Required. 248-251: Experimental Use. 252-255: Private Use.
Return Path Sub-TLV Type	Internet Draft draft-ietf-mpls-rfc6374-sr-17 1-175: IETF Review. 176-239: First Come First Served. 240-251: Experimental Use. 252-254: Private Use.
Segment ID Sub-TLV Flags	RFC 9716 Standards Action
TLVs	RFC 8029,RFC 9041 0-16383: Standards Action. 16384-31739: RFC Required. 31740-31743: Experimental Use. 31744-32767: First Come First Served. 32768-49161: Standards Action. 49162-64507: RFC Required. 64508-64511: Experimental Use. 64512-65535: First Come First Served.
Multipurpose Internet Mail Extensions (MIME) and Media Types
Access Types	RFC 4289 RFC publication required
CMS Encapsulating Content Types	RFC 7193 Expert Review (Expert: Russ Housley, Sean Turner)
CMS Inner Content Types	RFC 7193 Expert Review (Expert: Russ Housley, Sean Turner)
Event Code Registry	RFC 4733 Specification Required (Expert: Unassigned)
Markdown Variants	RFC 7763 First Come First Served
Media Types	RFC 6838,RFC 4855 Expert Review for Vendor and Personal Trees. For Standards Tree, seeRFC 6838, Section 3.1. (Expert: Alexey Melnikov, Darrel Miller, Murray Kucherawy (backup))
MIME to X.400 Table	RFC 1494 N/A
MIME to X.400 Table - Extended Body Part	RFC 1494 N/A
Parameter Values for the smime-type Parameter	RFC 7114 Specification Required (Expert: Russ Housley, Sean Turner (secondary))
Provisional Standard Media Type Registry	RFC 6838 FCFS (Organization subject to IESG Approval)
Report Types	RFC 8460 Specification Required (Expert: Murray Kucherawy)
Standards-related organizations that have registered Media Types in the Standards Tree	RFC 6838 IESG Approval
Structured Syntax Suffixes	RFC 6838 Expert Review (Expert: Alexey Melnikov, Darrel Miller)
Sub-Parameter Registry for application/aif+cbor and application/aif+json	RFC 9237 Specification Required (Expert: Göran Selander, Cigdem Sengul)
Sub-parameter Registry for application/mbox	RFC 4155 Specification Required (Expert: Unassigned)
Sub-Parameter Registry for audio/rtp-midi	RFC 6295 See sub-registries below
Sub-Parameter Registry for mode=rtp-midi of audio/mpeg4-generic	RFC 6295 See sub-registries below
Sub-Parameter Registry for video/raw	RFC 4175 See sub-registries below
Sub-Parameter Registry video/mpeg4-generic, audio/mpeg4-generic and application/mpeg4-generic	RFC 3640 Specification Required (Expert: Unassigned)
text/directory Parameters	RFC 2425 Two-week comment period, expert review (Expert: Rolf Sonneveld, Andrew Findlay)
text/directory Profiles	RFC 2425 Two-week comment period, expert review (Expert: Rolf Sonneveld, Andrew Findlay)
text/directory Types	RFC 2425 Two-week comment period, expert review (Expert: Rolf Sonneveld, Andrew Findlay)
Top-Level Media Types	RFC 9694 Standards Action
X.400 to MIME Table - Basic Body Parts	RFC 1494 N/A
N
Named Information
Named Information Hash Algorithm Registry	RFC 6920 Expert Review (Expert: James Manger)
Named Information URI Parameter Definitions	RFC 6920 Expert Review (Expert: James Manger)
Namespaces for IP over IEEE 1394
CSR Protocol Identifiers	RFC 2734 IANA allocation
MCAP (Multicast Channel Allocation Protocol) Parameters	RFC 2734,RFC 3146 Standards Action
Negative-ACKnowledgment (NACK) Oriented Reliable Multicast (NORM) Parameters
NORM Header Extension Types	RFC 5740 Specification Required (Expert: Unassigned)
NORM Stream Control Codes	RFC 5740 Specification Required (Expert: Unassigned)
NORM_CMD Message Sub-types	RFC 5740 Specification Required (Expert: Unassigned)
Netnews Parameters
Netnews Cancel-Lock Hash Algorithms	RFC 8315 First Come First Served
Network Configuration Protocol (NETCONF) Capability URNs
Capability URNs	RFC 6241,RFC 7803 IETF Review
Network File System version 4 (NFSv4)
NFSv4 ${ietf.org:CPU_ARCH} Values	RFC 8881 First Come First Served
NFSv4 ${ietf.org:OS_TYPE} Values	RFC 8881 First Come First Served
NFSv4 Device ID Notifications	RFC 8881 Standards Action with Expert Review (Expert: Unassigned)
NFSv4 Named Attribute Definitions	RFC 8881,RFC 7530 Specification Required for new registrations; updates to fields other than the contact field require Expert Review or IESG Approval (Expert: Unassigned)
NFSv4 Path Variables	RFC 8881 ietf.org domain: Standards Action with Expert Review. non-ietf.org. domain: First Come First Served. (Expert: Unassigned)
NFSv4 Recallable Object Types	RFC 8881 Standards Action with Expert Review (Expert: Unassigned)
pNFS Layout Types	RFC 8881 Standards Action with Expert Review (Expert: Unassigned)
Network Layer Protocol Identifiers (NLPIDs) of Interest
NLPIDs of Interest	RFC 6328 IETF Review
Network News Transfer Protocol (NNTP) Parameters
NNTP Capability Labels	RFC 3977 Labels beginning with X are reserved for private use. All others: Standards Track RFC or an IESG-approved experimental protocol.
NNTP Compression Algorithms	RFC 8054 First Come First Served
Network Service Header (NSH) Parameters
Flow ID Context Types	RFC 9263 IETF Review
Forwarding Context Types	RFC 9263 IETF Review
NSH Base Header Bits	RFC 8300 Standards Action
NSH IETF-Assigned Optional Variable-Length Metadata Types	RFC 8300 Standards Action
NSH MD Class	RFC 8300 0x0000-0x01FF: IETF Review. 0x0200-0xFFF5: Expert Review. (Expert: Carlos Pignataro, Joel Halpern, Jim Guichard)
NSH MD Types	RFC 8300 IETF Review
NSH Next Protocol	RFC 8300 Expert Review (Expert: Carlos Pignataro, Joel Halpern, Jim Guichard)
NSH Version	RFC 8300 Standards Action
Network Time Protocol (NTP) Parameters
NTP Extension Field Types	RFC 5905,RFC 5906,RFC 9748 Specification Required (Expert: Unassigned)
NTP Kiss-o'-Death Codes	RFC 5905,RFC 9748 Specification Required (Expert: Unassigned)
NTP Reference Identifier Codes	RFC 5905,RFC 9748 Specification Required (Expert: Unassigned)
Network Time Security (NTS)
Network Time Security Error Codes	RFC 8915 0-1023: IETF Review. 1024-32767: Specification Required. 32768-65535: Private or Experimental Use. (Expert: Miroslav Lichvar, Daniel Franke)
Network Time Security Key Establishment Record Types	RFC 8915 0-1023: IETF Review. 1024-16383: Specification Required. 16384-32767: Private or Experimental Use. (Expert: Miroslav Lichvar, Daniel Franke)
Network Time Security Next Protocols	RFC 8915 0-1023: IETF Review. 1024-32767: Specification Required. 32768-65535: Private or Experimental Use. (Expert: Miroslav Lichvar, Daniel Franke)
Network Time Security Warning Codes	RFC 8915 0-1023: IETF Review. 1024-32767: Specification Required. 32768-65535: Private or Experimental Use. (Expert: Miroslav Lichvar, Daniel Franke)
Network Virtualization Overlay (NVO3)
Geneve Option Class	RFC 8926 0x0000-0x00FF: IETF Review. 0x0100-0xFEFF: First Come First Served. 0xFF00-0xFFFF: Experimental Use.
Next Hop Resolution Protocol (NHRP) Types
NHRP Extension Types	RFC 2332 Expert Review (Expert: Jim Luciani)
NHRP Packet Types	RFC 2332 Expert Review (Expert: Jim Luciani)
Novell Service Advisor Protocol (SAP) Numbers - Novell Object Types
Novell Object Type	IANA does not assign
NSIS Signaling Layer Protocol (NSLP) Parameters
AUTH_ENT_ID (X-Type 1) SubType values	RFC 5981 Specification Required (Expert: Unassigned)
DEST_ADDR (X-Type 4) SubType values	RFC 5981 Specification Required (Expert: Unassigned)
END_TIME (X-Type 6) SubType values	RFC 5981 Specification Required (Expert: Unassigned)
Informational Error Codes	RFC 5974 0-63: IETF Review. 64-127: Specification Required. (Expert: Unassigned)
NATFW NSLP Header Flags	RFC 5973 IETF Review
NATFW NSLP Message Types	RFC 5973 IETF Review
NATFW Response Codes	RFC 5973 IETF Review
NSLP Error Classes	RFC 5974,RFC 5973 IETF Review
NSLP Message Objects	RFC 5974 1-1023: IETF Review. 1024-1999: Specification Required. (Expert: Unassigned)
Permanent Failure Codes	RFC 5974 0-63: IETF Review. 64-127: Specification Required. (Expert: Unassigned)
Protocol Error Codes	RFC 5974 0-63: IETF Review. 64-127: Specification Required. (Expert: Unassigned)
QoS Model Error Codes	RFC 5975 Specification Required (Expert: Unassigned)
QoS NSLP Binding Codes	RFC 5974 IETF Review
QoS NSLP Error Source Identifiers	RFC 5974 Specification Required (Expert: Unassigned)
QoS NSLP Message Types	RFC 5974 IETF Review
SESSION_AUTH X-Types	RFC 5981 Specification Required (Expert: Unassigned)
SOURCE_ADDR (X-Type 3) SubType values	RFC 5981 Specification Required (Expert: Unassigned)
START_TIME (X-Type 5) SubType values	RFC 5981 Specification Required (Expert: Unassigned)
Success Error Codes	RFC 5974 0-63: IETF Review. 64-127: Specification Required. (Expert: Unassigned)
Transient Failure Codes	RFC 5974 0-63: IETF Review. 64-127: Specification Required. (Expert: Unassigned)
O
OAuth Parameters
OAuth Access Token Types	RFC 6749,RFC 8414 Specification Required (Expert: Hannes Tschofenig, Mike Jones)
OAuth Authorization Endpoint Response Types	RFC 6749 Specification Required (Expert: Hannes Tschofenig, Mike Jones)
OAuth Authorization Server Metadata	RFC 8414 Specification Required (Expert: Mike Jones, Nat Sakimura, John Bradley, Dick Hardt)
OAuth Dynamic Client Registration Metadata	RFC 7591 Specification Required (Expert: Justin Richer)
OAuth Extensions Error Registry	RFC 6749 Specification Required (Expert: Hannes Tschofenig, Mike Jones)
OAuth Parameters	RFC 6749 Specification Required (Expert: Hannes Tschofenig, Mike Jones)
OAuth Protected Resource Metadata	Internet Draft draft-ietf-oauth-resource-metadata-13 Specification Required (Expert: Unassigned)
OAuth Token Endpoint Authentication Methods	RFC 7591,RFC 8414 Specification Required (Expert: Justin Richer)
OAuth Token Introspection Response	RFC 7662 Specification Required (Expert: Justin Richer)
OAuth Token Type Hints	RFC 7009 Specification Required (Expert: Torsten Lodderstedt, Mike Jones)
OAuth URI	RFC 6755 Specification Required (Expert: Hannes Tschofenig, Mike Jones)
PKCE Code Challenge Methods	RFC 7636 Specification Required (Expert: John Bradley, Mike Jones)
One Time Password (OTP) Parameters
Algorithm Identifier	RFC 2289 IESG Approval
Extension Set Identifiers	RFC 2243 IESG Approval
One-Way Active Measurement Protocol (OWAMP) Parameters
OWAMP-Control Command Numbers	RFC 7718 IETF Review
OWAMP-Modes	RFC 7718 IETF Review
Open Pluggable Edge Services (OPES)
OPES Callout Protocol (OCP) Core	RFC 4037 Expert Review for standards-track registration
Open Shortest Path First (OSPF)
Bandwidth Constraints Model Identifiers	RFC 4124 0-239: Specification Required. 240-255: Reserved for Private Use. (Expert: Unassigned)
Open Shortest Path First (OSPF) Authentication Codes
Authentication Codes	RFC 2328,RFC 6549 IETF Review
Open Shortest Path First (OSPF) Link Local Signalling (LLS) - Type/Length/Value Identifiers (TLV)
Link Local Signalling TLV Identifiers (LLS Types)	RFC 5613 IETF Review
LLS Type 1 Extended Options and Flags	RFC 5613 Expert Review (Expert: Gunter Van De Velde, Peter Psenak)
Open Shortest Path First (OSPF) Multi-Topology Routing
Multi-Topology ID Values	RFC 4915 0-2: Reserved. 3-31: IETF Review. 32-127: Reserved. 128-255: Reserved.
Open Shortest Path First (OSPF) Opaque Link-State Advertisements (LSA) Option Types
Opaque Link-State Advertisements (LSA) Option Types	RFC 5250 0-127: IETF Review. 128-255: Private Use.
OSPFv2 TTZ LSA TLVs	RFC 8099 IETF Review
Open Shortest Path First (OSPF) Parameters
OSPF Dynamic Flooding LSA TLVs	Internet Draft draft-ietf-lsr-dynamic-flooding-18 IETF Review or IESG Approval
OSPF Flex-Algorithm Prefix Metric Bits	RFC 9350 IETF Review
OSPF Flexible Algorithm Definition TLV Sub-TLVs	RFC 9350 IETF Review or IESG Approval
OSPF Link Attributes Sub-TLV Bit Values	Internet Draft draft-ietf-lsr-dynamic-flooding-18 IETF Review or IESG Approval
OSPF Router Functional Capability Bits	RFC 7770 IETF Review
OSPF Router Information (RI) TLVs	RFC 7770 1-32767: IETF Review. 32768-32777: Experimentation. 32778-65535: Reserved.
OSPF Router Informational Capability Bits	RFC 7770 IETF Review
OSPF Tunnel Parameter Sub-TLVs	RFC 9013 1-34999: Standards Action. 35000-65499: First Come First Served.
Open Shortest Path First (OSPF) Signature Algorithms
Signature Algorithms	RFC 2154 IETF Review
Open Shortest Path First (OSPF) Traffic Engineering TLVs
RFC 4973 Experimental TE LSA Types	RFC 4973 IETF Review
RFC 4973 Experimental TE TLVs	RFC 4973 IETF Review
Top Level Types in TE LSAs	RFC 3630 Standards Action
Types for sub-TLVs of Optical Node Property (Value 6)	RFC 7688 Standards Action
Types for sub-TLVs of OTN-TDM SCSI (Switching Capability Specific Information)	RFC 7138 Standards Action
Types for sub-TLVs of Router Address TLV (Value 1)	RFC 6827 Standards Action
Types for sub-TLVs of TE Link TLV (Value 2)	RFC 3630 Standards Action
Types for sub-TLVs of TE Node Attribute TLV (Value 5)	RFC 5786 Standards Action
Types for sub-TLVs of WSON-LSC SCSI (Switching Capability Specific Information)	RFC 7688 Standards Action
Open Shortest Path First v2 (OSPFv2) Parameters
IP Algorithm Prefix Reachability Sub-TLV Flags	RFC 9502 IETF Review or IESG Approval
OSPF Packet Type (both v2 and v3)	RFC 2328,RFC 4940 1-127: Standards Action. 128-255: Reserved.
OSPFv2 Extended Inter-Area ASBR Sub-TLVs	RFC 9350 IETF Review or IESG Approval
OSPFv2 Extended Inter-Area ASBR TLVs	RFC 9350 IETF Review or IESG Approval
OSPFv2 Extended Link Opaque LSA TLVs	RFC 7684 IETF Review or IESG Approval
OSPFv2 Extended Link TLV Sub-TLVs	RFC 7684,RFC 9356 IETF Review or IESG Approval
OSPFv2 Extended Prefix Opaque LSA TLVs	RFC 7684 IETF Review or IESG Approval
OSPFv2 Extended Prefix TLV Flags	RFC 7684 IETF Review or IESG Approval
OSPFv2 Extended Prefix TLV Sub-TLVs	RFC 7684 IETF Review or IESG Approval
OSPFv2 Grace LSA Top Level TLV	RFC 4940 1-255: Standards Action. 256-65519: Reserved. 65520-65527: Experimentation. 65528-65535: Vendor Private Use.
OSPFv2 Instance IDs	RFC 6549 Standards Action
OSPFv2 Link State (LS) Type	RFC 2328,RFC 4940 1-127: Standards Action. 128-255: Reserved.
OSPFv2 Options Registry (8 bits)	RFC 4940 Standards Action
OSPFv2 Router LSA Link Type (Value 1)	RFC 4940 1-127: Standards Action. 128-255: Reserved.
OSPFv2 Router Properties Registry	RFC 4940 Standards Action
Open Shortest Path First v3 (OSPFv3) Authentication Trailer Options
OSPFv3 Authentication Types	RFC 7166 Standards Action
Open Shortest Path First v3 (OSPFv3) Parameters
LD Options	RFC 5820 IETF Review
OSPFv3 Autoconfiguration (AC) LSA TLVs	RFC 7503 IETF Review or IESG Approval
OSPFv3 Extended-LSA Sub-TLVs	RFC 8362,RFC 9356 4-32767: IETF Review or IESG Approval. 33024-45055: First Come First Served.
OSPFv3 Extended-LSA TLVs	RFC 8362 9-32767: IETF Review or IESG Approval. 33024-45055: First Come First Served.
OSPFv3 Instance ID Address Family Values	RFC 5838,RFC 6969 Standards Action
OSPFv3 LSA Function Codes	RFC 7770 0-255: IETF Review. 256-8175: Reserved. 8176-8183: Experimentation. 8184-8190: Vendor Private Use. 8191: Reserved.
OSPFv3 Options (24 bits)	RFC 4940 Standards Action
OSPFv3 Prefix Options (8 bits)	RFC 4940 Standards Action
OSPFv3 Router LSA Link Types	RFC 4940 0-127: Standards Action. 128-255: Reserved.
OSPFv3 Router Properties Registry	RFC 5340 Standards Action
OSPFv3 SRv6 Adjacency SID Sub-TLV Flags	RFC 9513 Standards Action
OSPFv3 SRv6 Capabilities TLV Flags	RFC 9513 Standards Action
OSPFv3 SRv6 End SID Sub-TLV Flags	RFC 9513 Standards Action
OSPFv3 SRv6 Locator LSA Sub-TLVs	RFC 9513 0-32767: IETF Review or IESG Approval. 33024-45055: First Come First Served.
OSPFv3 SRv6 Locator LSA TLVs	RFC 9513 0-32767: IETF Review or IESG Approval. 33024-45055: First Come First Served.
Open Systems Interconnection (OSI) Network Service Access Point Addresses (NSAPA) Internet Code Point Registry
OSI NSAPA Internet Code Points for AFI 35	RFC 4548 IETF Review
OpenPGP
OpenPGP AEAD Algorithms	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP Armor Header Keys	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP Armor Header Lines	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP Compression Algorithms	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP ECC Curve OIDs and Usage	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP ECC Curve-Specific Wire Formats	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP ECDH KDF and KEK Parameters	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP Elliptic Curve Point Wire Formats	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP Elliptic Curve Scalar Encodings	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP Encrypted Message Packet Versions	RFC 9580 RFC Required
OpenPGP Features Flags	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP Hash Algorithm Identifiers for RSA Signatures' Use of EMSA-PKCS1-v1_5 Padding	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP Hash Algorithms	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP Image Attribute Encoding Format	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP Image Attribute Versions	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP Key and Signature Versions	RFC 9580 RFC Required
OpenPGP Key Flags	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP Key IDs and Fingerprints	RFC 9580 RFC Required
OpenPGP Key Server Preference Flags	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP New Packet Versions (OBSOLETE)	RFC 9580 Registry closed
OpenPGP Packet Types	RFC 9580 RFC Required
OpenPGP Public Key Algorithms	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP Reason for Revocation (Revocation Octet)	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP Secret Key Encryption (S2K Usage Octet)	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP Signature Notation Data Subpacket Notation Flags	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP Signature Notation Data Subpacket Types	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP Signature Subpacket Types	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP Signature Types	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP String-to-Key (S2K) Types	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP Symmetric Key Algorithms	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
OpenPGP User Attribute Subpacket Types	RFC 9580 Specification Required (Expert: Daniel Kahn Gillmor, Andrew Gallagher, Heiko Schäfer)
Operating System Names
Operating System Names	RFC 952 First Come First Served
OS Specific Fact Names	RFC 3659 First Come First Served
OS Specific Filetypes	RFC 3659 First Come First Served
Optimized Link State Routing (OLSR) Protocol Message Types
OLSR Protocol Message Types	RFC 3626 1-127: Standards Action. 128-255: Private/Local Use.
Opus Channel Mapping Families
Opus Channel Mapping Families	RFC 7845,RFC 8486 Specification Required (Expert: Tim Terriberry, Ralph Giles)
OSPF Database Description (DD) Packet Flags
Database Description (DD) Packet Flags	RFC 5838 Standards Action
P
Packet Sampling (PSAMP) Parameters
PSAMP selectorAlgorithm Identifiers	RFC 5476 Expert Review (Expert: Unassigned)
PAL Package Types
PAL Package Types	RFC 8295 Expert Review (Expert: Sean Turner)
Path Computation Element Protocol (PCEP) Numbers
ASSOCIATION Flag Field	RFC 8697,RFC 9756 IETF Review
ASSOCIATION Type Field	RFC 8697,RFC 9756 IETF Review
AUTO-BANDWIDTH-ATTRIBUTES Sub-TLV Types	RFC 8733 0-65503: IETF Review. 65504-65535: Experimental Use.
AUTO-BANDWIDTH-CAPABILITY TLV Flag Field	RFC 8733,RFC 9756 IETF Review
Bidirectional LSP Association Group TLV Flag Field	RFC 9059,RFC 9756 IETF Review
BPI Object Error Code Field	RFC 9757 IETF Review
BPI Object Flag Field	RFC 9757 IETF Review
BPI Object Status Code Field	RFC 9757 IETF Review
BU Object Type Field	RFC 8233,RFC 9756 IETF Review
CCI Object Flag Field for MPLS Label	RFC 9050,RFC 9756 IETF Review
CCI Object Flag Field for Native IP	RFC 9757 IETF Review
CLOSE Object Flag Field	RFC 5440 IETF Review
CLOSE Object Reason Field	RFC 5440 IETF Review
DISJOINTNESS-CONFIGURATION TLV Flag Field	RFC 8800,RFC 9756 IETF Review
Domain-ID TLV Domain Type	RFC 8685 IETF Review
FLOWSPEC Object Flag Field	RFC 9168,RFC 9756 IETF Review
Generalized Endpoint Types	RFC 8779,RFC 9756 0-244: IETF Review. 245-255: Experimental Use.
GMPLS-CAPABILITY TLV Flag Field	RFC 8779,RFC 9756 IETF Review
H-PCE-CAPABILITY TLV Flag Field	RFC 8685,RFC 9756 IETF Review
H-PCE-FLAG TLV Flag Field	RFC 8685,RFC 9756 IETF Review
Inter-Layer Object Path Property Bits	RFC 8282 IETF Review
IRO Subobjects	RFC 5521 IETF Review
LOAD-BALANCING Object Flag Field	RFC 5440 IETF Review
LSP Exclusion Subobject Flag Field	RFC 9504,RFC 9756 IETF Review
LSP Object Flag Field	RFC 8231,RFC 9756 IETF Review
LSP-ERROR-CODE TLV Error Code Field	RFC 8231,RFC 9756 IETF Review
LSP-EXTENDED-FLAG TLV Flag Field	RFC 9357,RFC 9756 IETF Review
LSPA Object Flag Field	RFC 5440 IETF Review
METRIC Object Flag Field	RFC 5440 IETF Review
METRIC Object T Field	RFC 5440 IETF Review
MONITORING Object Flag Field	RFC 5886 IETF Review
NO-PATH Object Flag Field	RFC 5440 IETF Review
NO-PATH Object NI Field	RFC 5440 IETF Review
NO-PATH-VECTOR TLV Flag Field	RFC 5440 IETF Review
Notification Object	RFC 5440 IETF Review
Notification Object Flag Field	RFC 5440 IETF Review
Objective Function	RFC 5541 1-1023: IETF Review. 1024-32767: First Come First Served. 32768-65535: Reserved for Private Use.
Open Object Flag Field	RFC 5440 IETF Review
OVERLOAD Object Flag field	RFC 5886 IETF Review
Path Protection Association Group TLV Flag Field	RFC 8745,RFC 9756 IETF Review
PATH-KEY Subobjects	RFC 5520 IETF Review
PATH-SETUP-TYPE-CAPABILITY Sub-TLV Type Indicators	RFC 8664,RFC 9756 IETF Review
PCECC-CAPABILITY sub-TLV	RFC 9050,RFC 9756 IETF Review
PCEP Flow Specification TLV Type Indicators	RFC 9168 0-255: Reserved. 256-64506: Specification Required. 64507-65531: First Come First Served. 65532-65535: Experimental Use.
PCEP Message Common Header Flag Field	RFC 5440 IETF Review
PCEP Messages	RFC 5440 0-251: IETF Review. 252-255: Experimental Use.
PCEP Objects	RFC 5440 0-247: IETF Review. 248-255: Experimental Use.
PCEP Path Setup Types	RFC 8408 IETF Review
PCEP SR-ERO NAI Types	RFC 8664 IETF Review
PCEP SRv6-ERO NAI Types	RFC 9603 IETF Review
PCEP TLV Type Indicators	RFC 5440 0-65503: IETF Review. 65504-65535: Experimental Use.
PCEP-ERROR Object Error Types and Values	RFC 5440,RFC 9756 0-251: IETF Review. 252-255: Experimental Use.
PCEP-ERROR Object Flag Field	RFC 5440 IETF Review
PROC-TIME Object Flag Field	RFC 5886 IETF Review
RP Object Flag Field	RFC 5440 IETF Review
S2LS Object Flag Field	RFC 8623,RFC 9756 IETF Review
SCHED-PD-LSP-ATTRIBUTE TLV Opt Field	RFC 8934,RFC 9756 IETF Review
Schedule TLVs Flag Field	RFC 8934,RFC 9756 IETF Review
SR Capability Flag Field	RFC 8664,RFC 9756 IETF Review
SR-ERO Flag Field	RFC 8664,RFC 9756 IETF Review
SRP Object Flag Field	RFC 8281,RFC 8786,RFC 9756 IETF Review
SRv6 Capability Flag Field	RFC 9603,RFC 9756 IETF Review
SRv6-ERO Flag Field	RFC 9603,RFC 9756 IETF Review
STATEFUL-PCE-CAPABILITY TLV Flag Field	RFC 8231,RFC 9756 IETF Review
SVEC Object Flag Field	RFC 5440 IETF Review
TE-PATH-BINDING TLV BT Field	RFC 9604,RFC 9756 IETF Review
TE-PATH-BINDING TLV Flag Field	RFC 9604,RFC 9756 IETF Review
WA Object Flag Field	RFC 8780,RFC 9756 IETF Review
Wavelength Allocation TLV Flag Field	RFC 8780,RFC 9756 IETF Review
Wavelength Restriction TLV Action Values	RFC 8780,RFC 9756 IETF Review
XRO Flag Field	RFC 5521 IETF Review
XRO Subobjects	RFC 5521 IETF Review
Peer-to-Peer Streaming Peer Protocol (PPSPP)
PPSP Peer Protocol Chunk Addressing Method Registry	RFC 7574 IETF Review
PPSP Peer Protocol Content Integrity Protection Method Registry	RFC 7574 IETF Review
PPSP Peer Protocol Merkle Hash Tree Function Registry	RFC 7574 IETF Review
PPSP Peer Protocol Message Type Registry	RFC 7574 IETF Review
PPSP Peer Protocol Option Registry	RFC 7574 IETF Review
PPSP Peer Protocol Version Number Registry	RFC 7574 IETF Review
Peer-to-Peer Streaming Tracker Protocol (PPSTP)
PPSTP Error Code Registry	RFC 7846 IETF Review
PPSTP Request Type Registry	RFC 7846 IETF Review
PPSTP Version Number Registry	RFC 7846 IETF Review
Per Hop Behavior Identification Codes
Per Hop Behavior Identification Codes	RFC 3140 Expert or area director review (Expert: Primary: Brian Carpenter; Secondary: David Black)
Performance Metrics
Performance Metric Name Elements - Method	RFC 8911 Specification Required (Expert: Greg Mirsky, Michael Scharf)
Performance Metric Name Elements - Metric Type	RFC 8911 Specification Required (Expert: Greg Mirsky, Michael Scharf)
Performance Metric Name Elements - Output	RFC 8911 Specification Required (Expert: Greg Mirsky, Michael Scharf)
Performance Metric Name Elements - Spec	RFC 8911 Specification Required (Expert: Greg Mirsky, Michael Scharf)
Performance Metric Name Elements - SubTypeMethod	RFC 8911 Specification Required (Expert: Greg Mirsky, Michael Scharf)
Performance Metric Name Elements - Units	RFC 8911 Specification Required (Expert: Greg Mirsky, Michael Scharf)
Performance Metrics Registry	RFC 8911 Specification Required (Expert: Greg Mirsky, Michael Scharf)
Permanent IPv6 Multicast Group Identifiers
Group Identifier Values	RFC 3307 Expert Review (Expert: Stig Venaas)
Point-to-Point (PPP) Protocol Field Assignments
IP Header Compression Configuration Option Suboption Types	RFC 3544 Standards Action
IP-Compression-Protocol Types	RFC 1332 IETF Review
IPv6-Compression-Protocol Types	RFC 5172 IETF Review
NetBIOS Frames Control Protocol (NBFCP) Configuration Options	RFC 2097 Expert Review (Expert: James Carlson)
PPP (IPXCP) Configuration Options	RFC 1552 Expert Review (Expert: James Carlson)
PPP ATCP Configuration Option Types	RFC 1378 Expert Review (Expert: James Carlson)
PPP Authentication Algorithms	RFC 1994 Expert Review (Expert: James Carlson)
PPP Banyan Vines Configuration Option Types	RFC 1763 Expert Review (Expert: James Carlson)
PPP Bridging Configuration Option Types	RFC 3518,RFC 3818 IETF Review
PPP Bridging MAC Types	RFC 3518,RFC 3818 IETF Review
PPP Bridging Spanning Tree	RFC 3518,RFC 3818 IETF Review
PPP CCP Configuration Option Types	RFC 1962,RFC 3818 IETF Review
PPP DLL Protocol Numbers	RFC 1661,RFC 3818 0xxx-3xxx: IETF Review. 4xxx-7xxx: IETF Review. 8xxx-bxxx: IETF Review. cxxx-fxxx: IETF Review.
PPP EAP Request/Response Types	RFC 3748 Expert Review
PPP ECP Configuration Option Types	RFC 1968 Expert Review (Expert: James Carlson)
PPP IPCP Configuration Option Types	RFC 1332,RFC 3818 IETF Review
PPP IPv6CP Configuration Options	RFC 5072,RFC 3818 IETF Review
PPP LCP Callback Operation Fields	RFC 1570,RFC 3818 IETF Review
PPP LCP Configuration Option Types	RFC 1661,RFC 3818 IETF Review
PPP LCP FCS-Alternatives	RFC 1570,RFC 3818 IETF Review
PPP Link Control Protocol (LCP) and Internet Protocol Control Protocol (IPCP) Codes	RFC 1661,RFC 3818 IETF Review
PPP Multilink Endpoint Discriminator Class	RFC 1990,RFC 3818 IETF Review
PPP OSINLCP Configuration Option Types	RFC 1377 Expert Review (Expert: James Carlson)
PPP Over Ethernet Versions	RFC 2516,RFC 8822 Specification Required (Expert: Donald Eastlake)
PPP SDCP Configuration Options	RFC 1963 Expert Review (Expert: James Carlson)
PPP TNCP Configuration Option Types	RFC 6361 IETF Review
PPP Vendor Specific OUI Options	RFC 5342 Registry closed byRFC 5342
ROHC Configuration Option Suboption Identifier Values	RFC 3241
Point-to-Point Over Ethernet (PPPoE) Parameters
PPPoE Active Discovery Code fields (8-bit values)	RFC 4937 First Come First Served
PPPoE TAG Values (16-bit values)	RFC 4937 First Come First Served
Port Control Protocol (PCP) Parameters
PCP Opcodes	RFC 6887 0-31, 127: Standards Action. 32-63: Specification Required. (Expert: Dan Wing, Stuart Cheshire)
PCP Options	RFC 6887 0-63, 127-191, 255: Standards Action. 64-95, 192-223: Specification Required. (Expert: Dan Wing, Stuart Cheshire)
PCP Result Codes	RFC 6887 0-127, 255: Standards Action. 128-191: Specification Required. (Expert: Dan Wing, Stuart Cheshire)
Portable Symmetric Key Container (PSKC)
Algorithm URI Registry and Related PSKC Profiles	RFC 6030 Specification Required (Expert: Unassigned)
Key Usage Registry	RFC 6030 Expert Review (Expert: Unassigned)
PSKC Version Registry	RFC 6030 Standards Action
Post Office Protocol version 3 (POP3) Extension Mechanism
POP3 Capabilities	RFC 2449 Standards Track or IESG-approved Experimental RFC
POP3 Response Codes	RFC 2449 RFC Specification Required
Post-Stack First Nibble
Post-Stack First Nibble	Internet Draft draft-ietf-mpls-1stnibble-13 Standards Action
Posture Attribute (PA) Protocol Compatible with Trusted Network Connect (TNC) Parameters
PA-TNC Attribute Types	RFC 5792 Specification Required (Expert: Steve Hanna, Jessica Fitzgerald-McKay, Charles Schmidt)
PA-TNC Error Codes	RFC 5792 Specification Required (Expert: Steve Hanna, Jessica Fitzgerald-McKay, Charles Schmidt)
PA-TNC Remediation Parameters Types	RFC 5792 Specification Required (Expert: Steve Hanna, Jessica Fitzgerald-McKay, Charles Schmidt)
Software Data Model Types	RFC 8412 Specification Required (Expert: David Waltermire, Jessica Fitzgerald-McKay)
Posture Broker (PB) Protocol Compatible with Trusted Network Connect (TNC) Parameters
PA Subtypes	RFC 5793 Specification Required (Expert: Steve Hanna, Jessica Fitzgerald-McKay, Charles Schmidt)
PB-TNC Error Codes	RFC 5793 Specification Required (Expert: Steve Hanna, Jessica Fitzgerald-McKay, Charles Schmidt)
PB-TNC Message Types	RFC 5793 Specification Required (Expert: Steve Hanna, Jessica Fitzgerald-McKay, Charles Schmidt)
PB-TNC Remediation Parameters Types	RFC 5793 Specification Required (Expert: Steve Hanna, Jessica Fitzgerald-McKay, Charles Schmidt)
Power State Sets
DMTF Power State Set	RFC 7326 Expert Review (Expert: Unassigned)
EMAN Power State Set	RFC 7326 Expert Review (Expert: Unassigned)
IEEE1621 Power State Set	RFC 7326 Expert Review (Expert: Unassigned)
PRECIS Derived Property Value
PRECIS Derived Property Value	RFC 8264,RFC 5892 Expert Review (Expert: Patrik Fältström)
Preparation and Comparison of Internationalized Strings (PRECIS) Parameters
PRECIS Base Classes	RFC 8264 RFC Required
PRECIS Profiles	RFC 8264 Expert Review (Expert: Peter Saint-Andre (primary), Pete Resnick (secondary), Andrew Sullivan (backup))
Presence SRV Protocol Label Registry
Presence SRV Protocol Labels	RFC 3861 Specification Required (Expert: Unassigned)
Printer MIB Interpreters Language Families - OBSOLETE
Printer MIB Interpreters Language Families - OBSOLETE	RFC 3805 Expert Review (Expert: Ira McDonald, Michael Sweet)
Privacy Enhanced RTP Conferencing (PERC)
Datagram Transport Layer Security (DTLS) Tunnel Protocol Message Types for Privacy Enhanced Conferencing	RFC 9185 IETF Review
Privacy Pass
Privacy Pass Token Types	RFC 9577 Specification Required (Expert: Tommy Pauly, Chris Wood)
Probabilistic Routing Protocol using History of Encounters and Transitivity (PRoPHET)
Bundle Offer and Response B Flags	RFC 6693 Specification Required (Expert: Unassigned)
Bundle Offer and Response TLV Flags	RFC 6693 Specification Required (Expert: Unassigned)
DTN Routing Protocol Number	RFC 6693 Specification Required (Expert: Unassigned)
Error TLV Flags	RFC 6693 Specification Required (Expert: Unassigned)
Hello TLV Flags 0, 1, 2	RFC 6693 Specification Required (Expert: Unassigned)
Hello TLV Flags 3-7	RFC 6693 Specification Required (Expert: Unassigned)
PRoPHET Codes for Failure	RFC 6693 Specification Required (Expert: Unassigned)
PRoPHET Codes for Success	RFC 6693 Specification Required (Expert: Unassigned)
PRoPHET Header Flags	RFC 6693 Specification Required (Expert: Unassigned)
PRoPHET Protocol Version	RFC 6693 Specification Required (Expert: Unassigned)
PRoPHET Result Field	RFC 6693 Specification Required (Expert: Unassigned)
PRoPHET TLV Type	RFC 6693 Specification Required (Expert: Unassigned)
RIB Dictionary TLV Flags	RFC 6693 Specification Required (Expert: Unassigned)
RIB Flags	RFC 6693 Specification Required (Expert: Unassigned)
RIB TLV Flags	RFC 6693 Specification Required (Expert: Unassigned)
Profile URIs
Profile URIs	RFC 7284 First Come First Served (Specification Suggested)
Pronet 80 Type Numbers
Pronet 80 Type Numbers	IANA does not assign
Protocol for Carrying Authentication for Network Access (PANA) Parameters
AVP Codes	RFC 5191,RFC 6786 Expert Review with Specification Required, or Standards Action (Expert: Alper Yegin)
AVP Flags	RFC 5191,RFC 5872 Standards Action or IESG Approval
Message Flags	RFC 5191,RFC 5872 Standards Action or IESG Approval
Message Types	RFC 5191,RFC 5872 1-65519: IETF Review or IESG Approval. 65520-65535: IANA does not assign.
Protocol Independent Multicast (PIM) Parameters
PIM Address Encoding Types	RFC 5384,RFC 7761,RFC 7887 IETF Review
PIM Address Family	RFC 3973,RFC 7761 IESG Approval
PIM Designated Router Load-Balancing Hash Algorithms	RFC 8775 IETF Review
PIM Flooding Mechanism Message Types	RFC 8364 IETF Review
PIM Join Attribute Types	RFC 5384 IETF Review
PIM Join/Prune Transport Types	RFC 8059 IETF Review
PIM Message Types	RFC 9436 IETF Review
PIM-Hello Options	RFC 7761,RFC 3973 First Come First Served (expire in 1 year); Specification Required for Permanent assignments (Expert: Stig Venaas, Jeffrey (Zhaohui) Zhang)
PORT Message Types	RFC 6559 RFC Required
PORT Option Types	RFC 6559 RFC Required
Protocol Numbers
Assigned Internet Protocol Numbers	RFC 5237,RFC 7045 IESG Approval or Standards Action
Protocol to Access White-Space (PAWS)
PAWS Error Code Registry	RFC 7545 Specification Required (Expert: Unassigned)
PAWS Parameters Registry	RFC 7545 Specification Required (Expert: Unassigned)
PAWS Ruleset ID Registry	RFC 7545 Specification Required (Expert: Unassigned)
Provisioning Domains (PvDs)
Additional Information PvD Keys	RFC 8801 Expert Review (Expert: Tommy Pauly, David Schinazi)
PvD Option Flags	RFC 8801 Standards Action
PvD Split DNS Claims	RFC 9704 Expert Review (Expert: Tommy Pauly, Tirumaleswar Reddy.K, Benjamin M. Schwartz)
Proxy Certificate Policy Languages
Proxy Certificate Policy Languages	RFC 3820 IETF Standards Action
Pseudowire Name Spaces (PWE3)
Associated Channel Header TLV Registry (DELETED)	RFC 5586,RFC 7026
Attachment Group Identifier (AGI) Type Registry	RFC 4446 2-64: Expert Review. 65-127: IETF Review. 128-254: First Come First Served. 255: IETF Review. (Expert: Stewart Bryant, Andrew Malis, Matthew Bocci)
Attachment Individual Identifier Type Registry	RFC 4446 2-64: Expert Review. 65-127: IETF Review. 128-254: First Come First Served. 255: IETF Review. (Expert: Stewart Bryant, Andrew Malis, Matthew Bocci)
CC/CV MEP-ID TLV Registry	RFC 6428,RFC 7214
G-ACh Advertisement Protocol Application Registry	RFC 7212,RFC 7214
G-ACh Advertisement Protocol TLV Registry	RFC 7212,RFC 7214
G-ACh Advertisement Protocol: Ethernet Interface Parameters	RFC 7213,RFC 7214
Header Compression Over MPLS PW Control Word Packet Type	RFC 4901 Expert Review
ICC RG Parameter Types	RFC 7275 0x0000: IETF Review. 0x003B-0x1FFF: Expert Review. 0x2000-0x2FFF: IETF Review. 0x3000-0x3FFE: First Come First Served. 0x3FFF: IETF Review. (Expert: Stewart Bryant, Matthew Bocci)
L2VPN PE Stack Capabilities	RFC 6575 IETF Review
MPLS Pseudowire Types Registry	RFC 4446 31-1024: Expert Review. 1025-4096: IETF Review. 4097-32766: First Come First Served. 32767: IETF Review. (Expert: Stewart Bryant, Andrew Malis, Matthew Bocci)
MPLS VCCV Connectivity Verification (CV) Types	RFC 5085 IETF Review
MPLS VCCV Control Channel (CC) Types	RFC 5085 IETF Review
Pseudowire Associated Channel Types	RFC 4385,RFC 5586,RFC 7026,RFC 7214
Pseudowire Interface Parameters Sub-TLV type Registry	RFC 4446 2-64: Expert Review. 65-127: IETF Review. 128-254: First Come First Served. 255: IETF Review. (Expert: Stewart Bryant, Andrew Malis, Matthew Bocci)
Pseudowire Status Codes Registry	RFC 4446 Expert Review (Expert: Stewart Bryant, Andrew Malis, Matthew Bocci)
Pseudowire Switching Point PE sub-TLV Type	RFC 6073 0: IETF Review. 1-64: Expert Review. 65-127: IETF Review. 128-254: First Come First Served. 255: IETF Review. (Expert: Primary: Stewart Bryant; secondary: Matthew Bocci)
PSN Tunnel Sub-TLV Name Space	RFC 7965 IETF Review
PW Generic Protocol Flags	RFC 6478 IETF Review
PW Status Refresh Reduction Configuration Message Sub-TLVs	RFC 8237 0x00: IETF Review. 0x04-0x40: Expert Review. 0x41-0x7F: IETF Review. 0x80-0xFE: Expert Review. 0xFF: IETF Review. (Expert: Stewart Bryant, Andrew Malis)
PW Status Refresh Reduction Control Messages	RFC 8237 0x00: IETF Review. 0x03-0x40: Expert Review. 0x41-0x7F: IETF Review. 0x80-0xFE: Expert Review. 0xFF: IETF Review. (Expert: Stewart Bryant, Andrew Malis)
PW Status Refresh Reduction Message Flags	RFC 8237 IETF Review
PW Status Refresh Reduction Notification Codes	RFC 8237 0x00000000: IETF Review. 0x00000008-0x00010000: Expert Review. 0x00010001-0x08000000: IETF Review. 0x08000001-0xFFFFFFFE: Expert Review. 0xFFFFFFFF: IETF Review. (Expert: Stewart Bryant, Andrew Malis)
VCCV Extended CV Types	RFC 7189 IETF Review
PT-EAP: Posture Transport (PT) Protocol For EAP Tunnel Methods
PT-EAP Versions	RFC 7171 Standards Action
Public Data Network Numbers
Public Data Network Numbers	RFC 1356 Registrations no longer accepted
Public Key Infrastructure using X.509 (PKIX) Parameters
Certification Authority Restriction Flags	RFC 8659 RFC Required
Certification Authority Restriction Properties	RFC 8659 Specification Required (Expert: Phillip Hallam-Baker)
PKIX SRV Protocol Labels	RFC 4386 Specification Required (Expert: Unassigned)
Public Notary Transparency
Error Types	RFC 9162 Specification Required (Expert: Unassigned)
Hash Algorithms	RFC 9162 0x00-0xDF: Specification Required. 0xE0-0xEF: Experimental Use. 0xF0-0xFF: Private Use. (Expert: Unassigned)
Log Artifact Extensions	RFC 9162 0x0000-0xDFFF: Specification Required. 0xE000-0xEFFF: Experimental Use. 0xF000-0xFFFF: Private Use. (Expert: Unassigned)
Log IDs	RFC 9162 First Come First Served
Signature Algorithms	RFC 9162 0x0000-0x0807: Specification Required. 0x0808-0xFDFF: Expert Review. 0xFE00-0xFEFF: Experimental Use. 0xFF00-0xFFFF: Private Use. (Expert: Unassigned)
VersionedTransTypes	RFC 9162 0x0100-0xDFFF: Specification Required. 0xE000-0xEFFF: Experimental Use. 0xF000-0xFFFF: Private Use. (Expert: Unassigned)
Q
QoS NSIS Signal Layering Protocol (NSLP) QSPEC Parameters
Excess Treatment Parameter	RFC 5975 Specification Required (Expert: Unassigned)
Extent of Restoration Field	RFC 5976 Specification Required (Expert: Unassigned)
Object Types	RFC 5975 Specification Required (Expert: Unassigned)
Parameter ID	RFC 5975 Specification Required (Expert: Unassigned)
QSPEC Procedure	RFC 5975 Specification Required (Expert: Unassigned)
QSPEC Type	RFC 5975 Specification Required (Expert: Unassigned)
QSPEC Version	RFC 5975 Specification Required (Expert: Unassigned)
Restoration Priority Field	RFC 5976 Specification Required (Expert: Unassigned)
Time to Restore Field	RFC 5976 Specification Required (Expert: Unassigned)
Y.1541 QoS Class Parameter	RFC 5975 Specification Required (Expert: Unassigned)
Y.2171 Admission Priority Parameter	RFC 5975 Specification Required (Expert: Unassigned)
QUIC
QUIC Frame Types	RFC 9000 provisional: Expert Review. provisional registration Date field update: First Come First Served. permanent, 0x00-0x3f: Standards Action or IESG Approval. permanent, greater than 0x3f: Specification Required. first unassigned codepoint: Standards Action. (Expert: Jana Iyengar, Ian Swett, Martin Thomson)
QUIC Transport Error Codes	RFC 9000 provisional: Expert Review. provisional registration Date field update: First Come First Served. permanent, 0x00-0x3f: Standards Action or IESG Approval. permanent, greater than 0x3f: Specification Required. first unassigned codepoint: Standards Action. (Expert: Jana Iyengar, Ian Swett, Martin Thomson)
QUIC Transport Parameters	RFC 9000 provisional: Expert Review. provisional registration Date field update: First Come First Served. permanent, 0x00-0x3f: Standards Action or IESG Approval. permanent, greater than 0x3f: Specification Required. first unassigned codepoint: Standards Action. values 31 * N + 27 (for integer values of N): Reserved. (Expert: Jana Iyengar, Ian Swett, Martin Thomson)
QUIC Versions	RFC 9000 provisional: Expert Review. provisional registration Date field update: First Come First Served. permanent: Specification Required. first unassigned codepoint: Standards Action. value 0x?a?a?a?a: Reserved. (Expert: Jana Iyengar, Ian Swett, Martin Thomson)
R
Radius Types
Code Values for RADIUS Attribute 241.1, Frag-Status	RFC 7499 RFC Required
Data Type	RFC 8044 Standards Action
Entity Types (Attribute 127, Location-Information)	RFC 5580 Expert Review (Expert: Alan DeKok, Mohit Sethi)
Location Profiles (Attribute 127, Location-Information)	RFC 5580 Expert Review (Expert: Alan DeKok, Mohit Sethi)
Location-Capable Attribute (Attribute 131)	RFC 5580 Expert Review (Expert: Alan DeKok, Mohit Sethi)
Operator Namespace Identifier for Attribute 126	RFC 5580 Expert Review (Expert: Alan DeKok, Mohit Sethi)
Option Codes Permitted in the Softwire46-Priority Attribute	RFC 8658 IETF Review
Privacy Flags (Attribute 129, Basic-Location-Policy-Rules)	RFC 5580 Expert Review (Expert: Alan DeKok, Mohit Sethi)
RADIUS Attribute Types	RFC 3575,RFC 6929,RFC 8044 1-191: IETF Review. 192-240: Reserved for Private Use. 224-240: Implementation Specific. 241-246 (extended space, Unassigned): IETF Review. 241-246 (extended space, Reserved): Standards Action. 247-255: Reserved.
RADIUS IP Port Configuration and Reporting TLVs	RFC 8045 Standards Action
RADIUS Packet Type Codes	RFC 3575 IESG Approval
RADIUS Softwire46 Configuration and Multicast Attributes	RFC 8658 Standards Action
Requested-Location-Info Attribute (Attribute 132)	RFC 5580 Expert Review (Expert: Alan DeKok, Mohit Sethi)
Values for RADIUS Attribute 10, Framed-Routing	RFC 2865,RFC 3575 Expert Review (Expert: Bernard Aboba)
Values for RADIUS Attribute 101, Error-Cause Attribute	RFC 3575,RFC 5176,RFC 7930 Expert Review (Expert: Bernard Aboba)
Values for RADIUS Attribute 13, Framed-Compression	RFC 2865,RFC 3575 Expert Review (Expert: Bernard Aboba)
Values for RADIUS Attribute 133, Framed-Management-Protocol Attribute	RFC 5607 Specification Required
Values for RADIUS Attribute 134, Management-Transport-Protection Attribute	RFC 5607 Specification Required
Values for RADIUS Attribute 15, Login-Service	RFC 2865,RFC 3575 Expert Review (Expert: Bernard Aboba)
Values for RADIUS Attribute 29, Termination-Action	RFC 2865,RFC 3575 Expert Review (Expert: Bernard Aboba)
Values for RADIUS Attribute 40, Acct-Status-Type	RFC 2866,RFC 3575 Expert Review (Expert: Bernard Aboba)
Values for RADIUS Attribute 45, Acct-Authentic	RFC 2866,RFC 3575 Expert Review (Expert: Bernard Aboba)
Values for RADIUS Attribute 49, Acct-Terminate-Cause	RFC 2866,RFC 3575 Expert Review (Expert: Bernard Aboba)
Values for RADIUS Attribute 6, Service-Type	RFC 2865,RFC 3575 IETF Review
Values for RADIUS Attribute 61, NAS-Port-Type	RFC 2865,RFC 3575 Expert Review (Expert: Bernard Aboba)
Values for RADIUS Attribute 64, Tunnel-Type	RFC 3575 Expert Review (Expert: Bernard Aboba)
Values for RADIUS Attribute 65, Tunnel-Medium-Type	RFC 3575 Expert Review (Expert: Bernard Aboba)
Values for RADIUS Attribute 7, Framed-Protocol	RFC 2865,RFC 3575 Expert Review (Expert: Bernard Aboba)
Values for RADIUS Attribute 72, ARAP-Zone-Access	RFC 2869,RFC 3575 Expert Review (Expert: Bernard Aboba)
Values for RADIUS Attribute 76, Prompt	RFC 2869,RFC 3575 Expert Review (Expert: Bernard Aboba)
Real Time Streaming Protocol (RTSP)/1.0 Parameters
RTSP/1.0 Headers	RFC 2326 Standards Document, preferably an IETF RFC
RTSP/1.0 Methods	RFC 2326 Standards Action
RTSP/1.0 Option Tags	RFC 2326 Specification Required (Expert: Unassigned)
RTSP/1.0 Status Codes	RFC 2326 Standards Action
Real-time Inter-network Defense (RID)
RID Enumeration List	RFC 6545 Expert Review (Expert: Unassigned)
XML Schemas Exchanged via RID	RFC 6545 Specification Required (Expert: Unassigned)
Real-Time Streaming Protocol (RTSP) 2.0 Parameters
Accept-Credentials Hash Algorithms	RFC 7826 Standards Action
Accept-Credentials Policies	RFC 7826 Standards Action
Cache-Control Cache Directive Extensions	RFC 7826 Standards Action or IESG Approval
Feature-tags	RFC 7826 First Come First Served
Media Properties	RFC 7826 Specification Required (Expert: Martin Stiemerling)
Notify-Reason Values	RFC 7826 Specification Required (Expert: Martin Stiemerling)
Range Header Formats	RFC 7826 Specification Required (Expert: Martin Stiemerling)
RSTP 2.0 Headers	RFC 7826 Expert Review (Expert: Martin Stiemerling)
RTP-Info Header Parameters	RFC 7826 Specification Required (Expert: Martin Stiemerling)
RTSP 2.0 Methods	RFC 7826 Standards Action
RTSP 2.0 Status Codes	RFC 7826 IETF Review
Seek-Style Policies	RFC 7826 Specification Required (Expert: Martin Stiemerling)
Terminate-Reason Header Parameters	RFC 7826 Specification Required (Expert: Martin Stiemerling)
Terminate-Reason Redirect Reasons	RFC 7826 Expert Review (Expert: Martin Stiemerling)
Transport Modes	RFC 7826 Standards Action
Transport Parameters	RFC 7826 Specification Required (Expert: Martin Stiemerling)
Transport Protocol Identifier	RFC 7826 Specification Required (Expert: Martin Stiemerling)
Real-Time Transport Protocol (RTP) Parameters
EKT Ciphers	RFC 8870 Specification Required (Expert: Unassigned)
EKT Message Types	RFC 8870 Specification Required (Expert: Unassigned)
FMT Values for PSFB Payload Types	RFC 4585 Specification Required (Expert: Magnus Westerlund, Roni Even)
FMT Values for RTPFB Payload Types	RFC 4585 Specification Required (Expert: Magnus Westerlund, Roni Even)
RAMS Response Code Space Registry	RFC 6285 1xx: Informational. 2xx: Success. 3xx: Redirection. 4xx: RTP Receiver (RTP_Rx) Error. 5xx: Burst/Retransmission Source (BRS) Error. Specification Required (Expert: Unassigned)
RAMS TLV Space Registry	RFC 6285 Specification Required (Expert: Unassigned)
RTCP Control Packet Types (PT)	RFC 5761,RFC 3550 1-191: Specification Required or Expert Review. 194-199: Specification Required or Expert Review. 200-223: Specification Required or Expert Review. 224-254: Specification Required or Expert Review. (Expert: Magnus Westerlund)
RTP Compact Header Extensions	RFC 8285 Expert Review (Expert: Magnus Westerlund)
RTP Payload Format Media Types	RFC 4855,RFC 9751 Registry closed
RTP Payload Types (PT) for standard audio and video encodings - Closed	RFC 3551 Registry closed; seeRFC 3551, Section 3
RTP Profile Names	RFC 3550 Standards Action or Expert Review (Expert: Unassigned)
RTP SDES Compact Header Extensions	RFC 7941 Expert Review (Expert: Magnus Westerlund)
RTP SDES Item Types	RFC 3550 Specification Required or Expert Review (Expert: Magnus Westerlund)
SFMT Values for RAMS Messages	RFC 6285 Specification Required (Expert: Unassigned)
SMT Values for TOKEN Packet Type Registry	RFC 6284 IETF Review
Sub-Report Block Type (SRBT) Values for the RSI Packet	RFC 5760 Specification Required (Expert: Unassigned)
Realm Specific IP (RSIP) Parameters
RSIP Address Types	RFC 3103 0: Reserved. 1-240: Specification Required. 241-255: Private Use. (Expert: Unassigned)
RSIP Error Codes	RFC 3103 Specification Required (Expert: Unassigned)
RSIP Local Flow Policies	RFC 3103 0: Reserved. 1-240: Specification Required. 241-255: Private Use. (Expert: Unassigned)
RSIP Message Types	RFC 3103 0: Reserved. 1-240: Specification Required. 241-255: Private Use. (Expert: Unassigned)
RSIP Methods	RFC 3103 0: Reserved. 1-240: Specification Required. 241-255: Private Use. (Expert: Unassigned)
RSIP Parameters	RFC 3103 0: Reserved. 1-240: Specification Required. 241-255: Private Use. (Expert: Unassigned)
RSIP Remote Flow Policies	RFC 3103 0: Reserved. 1-240: Specification Required. 241-255: Private Use. (Expert: Unassigned)
RSIP Tunnel Types	RFC 3103 0: Reserved. 1-240: Specification Required. 241-255: Private Use. (Expert: Unassigned)
RSIP Vendor IDs	RFC 3103 0: Reserved. 1-240: Specification Required. 241-255: Private Use. (Expert: Unassigned)
Realtime Traffic Flow Measurement (RTFM)
Pattern Matching Engine (PME) Opcodes	RFC 2722 IETF Review
RTFM Attributes	RFC 2722 0-511: IETF Review. 512-1023: First Come First Served. 1024 and above: Reserved for Private Use.
Registrar IDs
Registrar IDs	Assigned by ICANN
Registration Data Access Protocol (RDAP)
Bootstrap Service Registry for AS Number Space	RFC 9224
Bootstrap Service Registry for Domain Name Space	RFC 9224
Bootstrap Service Registry for IPv4 Address Space	RFC 9224
Bootstrap Service Registry for IPv6 Address Space	RFC 9224
Bootstrap Service Registry for Provider Object Tags	RFC 8521
RDAP Extensions	RFC 7480 Specification Required (Expert: Andy Newton, Scott Hollenbeck)
RDAP JSON Values	RFC 9083,RFC 9537 Expert Review (Expert: Andy Newton, Scott Hollenbeck)
RDAP Provider Object Tags	RFC 8521 First Come First Served
RDAP Reverse Search	RFC 9536 Specification Required (Expert: Andy Newton, Scott Hollenbeck)
RDAP Reverse Search Mapping	RFC 9536 Specification Required (Expert: Andy Newton, Scott Hollenbeck)
Registration Data Access Protocol (RDAP) Query Purpose Values	RFC 9560 Specification Required (Expert: Scott Hollenbeck, Andrew Newton, Mario Loffredo, Pawel Kowalik)
Registry for the Session Initiation Protocol (SIP) NAPTR Resource Record Services Field
SIP Table of Mappings From Service Field Values to Transport Protocols	RFC 3263 Standards Action
Relay User Equipment (RUE)
RUE Provider List	RFC 9248 Expert Review (Expert: Brian Rosen)
Reliable Multicast Transport (RMT) FEC Encoding IDs and FEC Instance IDs
FEC Framework (FECFRAME) FEC Encoding IDs	RFC 6363 IETF Review
ietf:rmt:fec:encoding - Fully-Specified FEC schemes (0-127)	RFC 5052 IETF Review
ietf:rmt:fec:encoding - Under-Specified FEC schemes (128-255)	RFC 5052 IETF Review
Reliable Server Pooling (RSerPool) Parameters
Aggregate Server Access Protocol (ASAP) Message Types	RFC 5352 Specification Required (Expert: Unassigned)
Endpoint Handlespace Redundancy Protocol (ENRP) Message Types	RFC 5353 Specification Required (Expert: Unassigned)
RSerPool Error Causes	RFC 5354 Specification Required (Expert: Unassigned)
RSerPool Parameter Types	RFC 5354 Specification Required (Expert: Unassigned)
RSerPool Policy Types	RFC 5356 Specification Required (Expert: Unassigned)
Update Action Types	RFC 5353 Specification Required (Expert: Unassigned)
Remote Attestation Procedures (RATS)
Entity Attestation Token (EAT) Intended Uses	Internet Draft draft-ietf-rats-eat-30 Expert Review (Expert: Unassigned)
Remote Direct Data Placement
RDMA-CM Private Data Identifiers	RFC 8797 Specification Required (Expert: Chuck Lever (primary), Tom Talpey (secondary))
Remote Direct Data Placement (RDDP)
DDP Errors	RFC 6580 Standards Action
MPA Errors	RFC 6580 Standards Action
RDMAP DDP Untagged Queue Numbers	RFC 7306 Standards Action
RDMAP Errors	RFC 6580 Standards Action
RDMAP Message Atomic Operation Subcodes	RFC 7306 Standards Action
RDMAP Message Operation Codes	RFC 6580 Standards Action
SCTP Function Codes for DDP Stream Session Control	RFC 6580 Standards Action
Remote Framebuffer (RFB)
Remote Framebuffer Client-to-Server Message Types	RFC 6143 Expert Review (Expert: Tristan Richardson)
Remote Framebuffer Encoding Types	RFC 6143 Expert Review (Expert: Tristan Richardson, John Levine)
Remote Framebuffer Security Types	RFC 6143 Expert Review (Expert: Tristan Richardson)
Remote Framebuffer Server-to-Client Message Types	RFC 6143 Expert Review (Expert: Tristan Richardson)
Remote Procedure Call (RPC)
Network Identifier (r_netid)	RFC 7530 Informational RFC
ONC RPC Netids (First Come First Served)	RFC 5665 First Come First Served
ONC RPC Netids (Standards Action)	RFC 5665 Standards Action
ONC RPC Uaddr Format Registry	RFC 5665 First Come First Served or Standards Action
Protocol family (r_nc_protofmly)	RFC 1833 Standards Action
Protocol name (r_nc_proto)	RFC 1833 Standards Action
RPC Authentication Flavor Numbers	RFC 5531 First Come First Served
RPC Authentication Status Numbers	RFC 5531 First Come First Served
RPCSEC_GSS Structured Privilege Names Registry	RFC 7861 Standards Action
Transport semantics (r_nc_semantics)	RFC 1833 Standards Action
Remote Procedure Call (RPC) Program Numbers
RPC Program Numbers	RFC 5531 Up to 100 numbers: First Come First Served. 101-1000 numbers: Specification Required. More than 1000 numbers: IESG Approval. (Expert: Unassigned)
Reputation Parameters
Reputation Applications	RFC 7071 IETF Review or Specification Required (Expert: Unassigned)
Reserved IPv6 Interface Identifiers
Reserved IPv6 Interface Identifiers	RFC 5453,RFC 7136 Standards Action
REsource LOcation And Discovery (RELOAD)
CoAP Usage for RELOAD Access Control Policy	RFC 7650 Specification Required (Expert: Unassigned)
RELOAD Access Control Policies	RFC 6940 Standards Action
RELOAD Application-ID	RFC 6940 1-32767: Standards Action. 32768-61440: Expert Review. (Expert: Marc Petit-Huguenin (primary), Cullen Jennings (secondary))
RELOAD Data Kind-ID	RFC 6940 0x00000001-0x7fffffff: Standards Action. 0x8000000-0xf0000000: Expert Review. (Expert: Marc Petit-Huguenin (primary), Cullen Jennings (secondary))
RELOAD Data Model	RFC 6940 Standards Action
RELOAD Diagnostic Kind ID	RFC 7851 Standards Action
RELOAD Diagnostics Flag	RFC 7851 Standards Action
RELOAD Error Codes	RFC 6940 Standards Action
RELOAD Extensions Registry	RFC 6940 Specification Required (Expert: Marc Petit-Huguenin (primary), Cullen Jennings (secondary))
RELOAD Forwarding Option Registry	RFC 6940 01-127: Standards Action. 128-254: Specification Required. (Expert: Marc Petit-Huguenin (primary), Cullen Jennings (secondary))
RELOAD Message Codes	RFC 6940 Standards Action
RELOAD Overlay Algorithm Types	RFC 6940 IETF Review
RELOAD Overlay Link Protocol Registry	RFC 6940 Standards Action
RELOAD Overlay Link Registry	RFC 6940 Standards Action
RELOAD Probe Information Type Registry	RFC 6940 Standards Action
RELOAD Services Registry	RFC 7374 Specification Required (Expert: Unassigned)
Resource Public Key Infrastructure (RPKI)
BGPsec Algorithm Suites	RFC 8608 Standards Action
BGPsec Capability	RFC 8205 Standards Action
BGPsec_Path Flags	RFC 8205 Standards Action
RPKI Repository Name Schemes	RFC 6481 IETF Review
RPKI Signed Objects	RFC 6488 Standards Action
rpki-rtr-afi	Internet Draft draft-ietf-sidrops-8210bis-10 Expert Review (Expert: Unassigned)
rpki-rtr-error	RFC 6810 Expert Review (Expert: Keyur Patel (Primary), John G. Scudder (Secondary))
rpki-rtr-pdu	RFC 6810 RFC Required (Standards Track or Experimental)
Resource Reservation Protocol (RSVP) Parameters
Call Attributes Flags	RFC 6001 RFC Required
Call Attributes TLV	RFC 6001 RFC Required
Capability Object values	RFC 5063 Standards Action
Class Names, Class Numbers, and Class Types	RFC 3936 0-119: Standards Action. 120-123: Expert Review. 124-127: Reserved for Private Use. 128-183: Standards Action. 184-187: Expert Review. 188-191: Reserved for Private Use. 192-247: Standards Action. 248-251: Expert Review. 252-255: Reserved for Private Use. (Expert: Dimitri Papadimitriou)
CONDITIONS Object Flags	RFC 9705 IETF Review
Error Codes and Globally-Defined Error Value Sub-Codes	RFC 3936 0-239: Standards Action. 240-251: Expert Review. 252-255: Reserved for Private Use. (Expert: Dimitri Papadimitriou)
Interface Id Error specification
Message Types	RFC 3936 0-239: Standards Action. 240-255: Expert Review. (Expert: Dimitri Papadimitriou)
VCAT Elementary Signal Registry	RFC 6344 IETF Review
VCAT VCG Operation Actions	RFC 6344 IETF Review
Virtual Destination Ports	RFC 2207 0: Reserved. 1-10: Reserved. 11-8191: Not Defined. 8192-65535: Dynamic.
Resource Reservation Protocol-Traffic Engineering (RSVP-TE) Parameters
Attribute Flags	RFC 5420,RFC 7570 IETF Review
Attributes TLV Space	RFC 5420,RFC 7570 IETF Review
Record Route Object Sub-object Flags	RFC 3209 Standards Action
RTM_SET Object Sub-Object Types	RFC 8169 0-127: IETF Review. 128-191: First Come First Served.
Session Attribute Object Flags	RFC 4859 IETF Review
Sub-TLV Types for WSON Processing Hop Attribute TLV	RFC 7689 Standards Action or Specification Required (Expert: Unassigned)
Values for Wavelength Assignment Method field in WavelengthSelection Sub-TLV	RFC 7689 Standards Action or Specification Required (Expert: Unassigned)
Resource-Oriented Lightweight Information Exchange (ROLIE) URN Parameters
ROLIE Information Types	RFC 8322 Specification Required (Expert: David Waltermire, Stephen Banghart)
ROLIE URN Parameters	RFC 8322 Specification Required (Expert: David Waltermire, Stephen Banghart)
RESTCONF Capability URNs
RESTCONF Capability URNs	RFC 8040 IETF Review
RObust Header Compression (ROHC) Profile Identifiers
Profile Identifiers	RFC 5795 Specification Required (Expert: Unassigned)
RObust Header Compression (ROHC) Suboption Identifier Values
ROHC Configuration Option Suboption Identifier Values	RFC 3241 0-127: Standards Action. 128-254: Specification Required. (Expert: Unassigned)
Route Distinguisher Type Field
Route Distinguisher Type Field	RFC 4364 0-32767: First Come First Served. 32768-65535: IETF Review.
Routing in Fat Trees (RIFT)
RIFT Security Algorithms	Internet Draft draft-ietf-rift-rift-24 Specification Required (Expert: Unassigned)
RIFTCommonAddressFamilyType	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTCommonHierarchyIndications	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTCommonIEEE8021ASTimeStampType	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTCommonIPAddressType	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTCommonIPPrefixType	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTCommonIPv4PrefixType	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTCommonIPv6PrefixType	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTCommonKVTypes	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTCommonPrefixSequenceType	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTCommonRouteType	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTCommonTieDirectionType	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTCommonTIETypeType	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTEncodingCommunity	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTEncodingKeyValueTIEElement	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTEncodingKeyValueTIEElementContent	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTEncodingLIEPacket	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTEncodingLinkCapabilities	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTEncodingLinkIDPair	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTEncodingNeighbor	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTEncodingNodeCapabilities	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTEncodingNodeFlags	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTEncodingNodeNeighborsTIEElement	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTEncodingNodeTIEElement	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTEncodingPacketContent	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTEncodingPacketHeader	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTEncodingPrefixAttributes	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTEncodingPrefixTIEElement	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTEncodingProtocolPacket	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTEncodingTIDEPacket	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTEncodingTIEElement	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTEncodingTIEHeader	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTEncodingTIEHeaderWithLifeTime	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTEncodingTIEID	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTEncodingTIEPacket	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTEncodingTIREPacket	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
RIFTVersions	Internet Draft draft-ietf-rift-rift-24 Minor change (per RFC-ietf-rift-rift-24, Section 7): Expert Review. All other allocations: Specification Required. (Expert: Unassigned)
Routing Information Protocol (RIP) Parameters
RIP Address Family Identifiers	RFC 1058 Not defined
RIP Authentication Type	RFC 1388 Not defined
RIP Commands	RFC 1723 Not defined
RIP Update Headers	RFC 1058 Not Defined
RIPNG Commands	RFC 2080 Not defined
RIPNG Update Headers	RFC 2080 Not defined
Routing Protocol for Low Power and Lossy Networks (RPL)
Consistency Check (CC) Flags	RFC 6550 IETF Review
Destination Advertisement Object (DAO) Acknowledgment Flags	RFC 6550 IETF Review
Destination Advertisement Object (DAO) Flags	RFC 6550 IETF Review
Destination Cleanup Object (DCO) Flags	RFC 9009 IETF Review
Destination Cleanup Object Acknowledgment (DCO) Acknowledgment Flags	RFC 9009 IETF Review
DODAG Configuration Option Flags for MOP 0..6	RFC 6550,RFC 9008 IETF Review
DODAG Information Object (DIO) Flags	RFC 6550 IETF Review
DODAG Informational Solicitation (DIS) Flags	RFC 6550 IETF Review
Mode of Operation	RFC 6550,RFC 9008 IETF Review
Objective Code Point (OCP)	RFC 6550 IETF Review
PDR-ACK Acceptance Status Values	Internet Draft draft-ietf-roll-dao-projection-40 Standards Action
PDR-ACK Flags	Internet Draft draft-ietf-roll-dao-projection-40 Standards Action
PDR-ACK Rejection Status Values	Internet Draft draft-ietf-roll-dao-projection-40 Standards Action
Per-KIM Security Levels	RFC 6550 IETF Review
Projected DAO Request (PDR) Flags	Internet Draft draft-ietf-roll-dao-projection-40 Standards Action
RPL Control Codes	RFC 6550 IETF Review
RPL Control Message Options	RFC 6550 IETF Review
RPL Non-Rejection Status	RFC 9010 IETF Review
RPL Option Flags	Internet Draft draft-ietf-roll-dao-projection-40 Standards Action
RPL Rejection Status	RFC 9010 IETF Review
RPL Target Option Flags	RFC 6550,RFC 9010 IETF Review
Security Section Algorithm	RFC 6550 IETF Review
Security Section Flags	RFC 6550 IETF Review
Sibling Information Option (SIO) Flags	Internet Draft draft-ietf-roll-dao-projection-40 Standards Action
Solicited Information Option Flags	RFC 6550 IETF Review
Transit Information Option Flags	RFC 6550 IETF Review
Via Information Options (VIO) Flags	Internet Draft draft-ietf-roll-dao-projection-40 Standards Action
Routing Protocol for Low Power and Lossy Networks (RPL) Routing Metric/Constraint
Hop-Count Object Flag field	RFC 6551 IETF Review
Node Type Field	RFC 6551 IETF Review
NSA Object Flag field	RFC 6551 IETF Review
Routing Metric/Constraint Common Header A field	RFC 6551 IETF Review
Routing Metric/Constraint Common Header Flag field	RFC 6551 IETF Review
Routing Metric/Constraint TLVs	RFC 6551 First Come First Served
Routing Metric/Constraint Type	RFC 6551 IETF Review
RSVP-TE OAM Configuration Registry
BFD Configuration Sub-TLV Types	RFC 7487 IETF Review
Ethernet Sub-TLVs Sub-Registry	RFC 7369 IETF Review
MPLS OAM Configuration Sub-TLV Types	RFC 7487 IETF Review
OAM Function Flags Sub-Registry	RFC 7260 IETF Review
OAM Sub-TLVs	RFC 7260 0-31: IETF Review. 32-65533: IETF Review. 65534-65535: Reserved for Experimental Use.
OAM Types	RFC 7260 IETF Review
Performance Monitoring Sub-TLV Types	RFC 7487 IETF Review
RTP Control Protocol Extended Reports (RTCP XR) Block Type Registry
IDMS XR Block SPST Registry	RFC 7272 Specification Required (Expert: Roni Even)
RTCP XR Block Type	RFC 3611 Specification Required (Expert: Joerg Ott)
RTCP XR MOS Metric block - multimedia application Calculation Algorithm	RFC 7266 Specification Required (Expert: Roni Even)
RTCP XR PDV block - PDV type	RFC 6798 Specification Required (Expert: Roni Even)
RTP Control Protocol Extended Reports (RTCP XR) Session Description Protocol (SDP) Parameters Registry
RTCP XR SDP Parameters	RFC 3611 Specification Required (Expert: Joerg Ott)
S
Scalable Adaptive Multicast (SAM) Baseline
SAM ALM Algorithm IDs	RFC 7019 Expert Review (Expert: Marc Petit-Huguenin (primary), Thomas Schmidt, John Buford)
SAM ALM Error Codes	RFC 7019 Expert Review (Expert: Marc Petit-Huguenin (primary), Thomas Schmidt, John Buford)
SAM ALM Message Codes	RFC 7019 Expert Review (Expert: Marc Petit-Huguenin (primary), Thomas Schmidt, John Buford)
Secret Key Transaction Authentication for DNS (TSIG) Algorithm Names
TSIG Algorithm Names	RFC 8945 IETF Review
Secure Shell (SSH) Protocol Parameters
Authentication Method Names	RFC 4250,RFC 9519 Expert Review (Expert: Peter Yee, Markus Stenberg)
Channel Connection Failure Reason Codes and Descriptions	RFC 4250,RFC 9519 0x00000001-0xFDFFFFFF: Expert Review. 0xFE000000-0xFFFFFFFF: Reserved for Private Use. (Expert: Peter Yee, Markus Stenberg)
Compression Algorithm Names	RFC 4250,RFC 9519 Expert Review (Expert: Peter Yee, Markus Stenberg)
Connection Protocol Channel Request Names	RFC 4250,RFC 9519 Expert Review (Expert: Peter Yee, Markus Stenberg)
Connection Protocol Channel Types	RFC 4250,RFC 9519 Expert Review (Expert: Peter Yee, Markus Stenberg)
Connection Protocol Global Request Names	RFC 4250,RFC 9519 Expert Review (Expert: Peter Yee, Markus Stenberg)
Connection Protocol Subsystem Names	RFC 4250,RFC 9519 Expert Review (Expert: Peter Yee, Markus Stenberg)
Disconnection Messages Reason Codes and Descriptions	RFC 4250,RFC 9519 0x00000001-0xFDFFFFFF: Expert Review. 0xFE000000-0xFFFFFFFF: Reserved for Private Use. (Expert: Peter Yee, Markus Stenberg)
Encryption Algorithm Names	RFC 4250,RFC 9519 Expert Review (Expert: Peter Yee, Markus Stenberg)
Extended Channel Data Transfer data_type_code and Data	RFC 4250,RFC 9519 0x00000001-0xFDFFFFFF: Expert Review. 0xFE000000-0xFFFFFFFF: Reserved for Private Use. (Expert: Peter Yee, Markus Stenberg)
Extension Names	RFC 8308,RFC 9519 Expert Review (Expert: Peter Yee, Markus Stenberg)
Key Exchange Method Names	RFC 4250,RFC 9142,RFC 9519 Expert Review (Expert: Peter Yee, Markus Stenberg)
MAC Algorithm Names	RFC 4250,RFC 9519 Expert Review (Expert: Peter Yee, Markus Stenberg)
Message Numbers	RFC 4250 Standards Action
Pseudo-Terminal Encoded Terminal Modes	RFC 4250,RFC 9519 Expert Review (Expert: Peter Yee, Markus Stenberg)
Public Key Algorithm Names	RFC 4250,RFC 9519 Expert Review (Expert: Peter Yee, Markus Stenberg)
Publickey Subsystem Attributes	RFC 4819,RFC 9519 Expert Review (Expert: Peter Yee, Markus Stenberg)
Publickey Subsystem Request Names	RFC 4819,RFC 9519 Expert Review (Expert: Peter Yee, Markus Stenberg)
Publickey Subsystem Response Names	RFC 4819,RFC 9519 Expert Review (Expert: Peter Yee, Markus Stenberg)
Publickey Subsystem Status Codes	RFC 4819 0-191: Standards Action. 192-255: Reserved for Private Use.
Service Names	RFC 4250,RFC 9519 Expert Review (Expert: Peter Yee, Markus Stenberg)
Signal Names	RFC 4250,RFC 9519 Expert Review (Expert: Peter Yee, Markus Stenberg)
SSH Public-Key File Header Tags	RFC 4716,RFC 9519 Expert Review (Expert: Peter Yee, Markus Stenberg)
Security Event Token (SET)
Security Event Token Error Codes	RFC 8935 Specification Required (Expert: Mike Jones, John Bradley)
Subject Identifier Formats	RFC 9493 Specification Required (Expert: Prachi Jain)
Security External Enumeration Registry
Security External Enumeration Registry	RFC 7495 Specification Required (Expert: Unassigned)
Security Label Format Selection
Security Label Format Selection Registry	RFC 7569 Specification Required (Expert: Unassigned)
Security Parameters Index (SPI) Parameters
Security Parameters Index (SPI)	RFC 1826,RFC 2402,RFC 2406,RFC 4302,RFC 4303 RFC Required
security.txt Fields
security.txt Fields	RFC 9116 Expert Review (Expert: Yakov Shafranovich, Edwin Foudil)
Segment Routing
Segment Types	RFC 9256 Specification Required (Expert: Ketan Talaulikar, Matthew Bocci)
SR Policy ENLP Values	Internet Draft draft-ietf-idr-sr-policy-safi-13 Standards Action
SR Policy Protocol Origin	Internet Draft draft-ietf-idr-bgp-ls-sr-policy-17 1-250: Expert Review. 251-255: Private Use. (Expert: Unassigned)
SRv6 Endpoint Behaviors	RFC 8986 0: Reserved. 1-32767: First Come First Served. 32768-34815: Private Use. 34816-65534: Reserved. 65535: Reserved.
Selective P-Multicast Service Interface (S-PMSI) Parameters
S-PMSI Join Message Type Field	RFC 6513 IETF Review
Semantic Definition Format (SDF)
Feature Names	Internet Draft draft-ietf-asdf-sdf-23 Specification Required (Expert: Unassigned)
Quality Name Prefixes	Internet Draft draft-ietf-asdf-sdf-23 Expert Review (Expert: Unassigned)
Quality Names	Internet Draft draft-ietf-asdf-sdf-23 Specification Required (Expert: Unassigned)
sdfType Values	Internet Draft draft-ietf-asdf-sdf-23 Specification Required (Expert: Unassigned)
Sender Policy Framework (SPF) Parameters
Modifier Names	RFC 6652 Specification Required (Expert: Unassigned)
Sensor Measurement Lists (SenML)
Secondary Units	RFC 8798 Expert Review (Expert: Ari Keränen)
SenML Features	RFC 9100 Specification Required (Expert: Ari Keränen (primary), Carsten Bormann (secondary))
SenML Labels	RFC 8428 Expert Review (Expert: Ari Keränen)
SenML Units	RFC 8428 Expert Review (Expert: Ari Keränen)
Server Cache Synchronization Protocol (SCSP) Parameters
Protocol IDs	RFC 2334 RFC, product of standards body, or Expert Review
Service Function Chaining (SFC) Active Operations, Administration, and Maintenance (OAM)
SF Identifier Types	RFC 9516 0-191: IETF Review. 192-251: First Come First Served. 252-254: Private Use.
SFC Active OAM Message Types	RFC 9516 0-31: IETF Review. 32-62: First Come First Served.
SFC Active OAM TLV Types	RFC 9516 0-175: IETF Review. 176-239: First Come First Served. 240-251: Experimental Use. 252-254: Private Use.
SFC Echo Reply Modes	RFC 9516 0-175: IETF Review. 176-239: First Come First Served. 240-251: Experimental Use. 252-254: Private Use.
SFC Echo Request Flags	RFC 9516 Standards Action
SFC Echo Return Codes	RFC 9516 0-191: IETF Review. 192-251: First Come First Served. 252-254: Private Use.
SFC Echo Types	RFC 9516 0-175: IETF Review. 176-239: First Come First Served. 240-251: Experimental Use. 252-254: Private Use.
Service Function Chaining Service Function Types
Service Function Chaining Service Function Types	RFC 9015 1-31: Standards Action. 32-64495: First Come First Served. 64496-65534: Private Use.
Service Location Protocol (SLP) Remote Service Discovery
SLP Remote Service Discovery	RFC 3832 Expert Review (Expert: Unassigned)
Service Location Protocol Version 2 (SLPv2) Cryptographic BSD Codes
Cryptographic BSD Codes	RFC 2608 IETF Review
Service Location Protocol Version 2 (SLPv2) Registrations
Service Location Protocol, Version 2 (SLPv2) Templates	RFC 2609 Expert Review (Expert: Erik Guttman)
SLPv2 Extension IDs	RFC 2608 Expert Review (Expert: Erik Guttman)
Service Location Protocol, Version 2 (SLPv2) Error Numbers
Error Numbers	RFC 2608 Standards Action
Service Location Protocol, Version 2 (SLPv2) Function IDs
Function IDs	RFC 2608 IETF Review
Service Names and Transport Protocol Port Numbers
Service Name and Transport Protocol Port Number Registry	RFC 6335 (Expert: TCP/UDP: Joe Touch; Eliot Lear, Kumiko Ono, Wes Eddy, Brian Trammell, Jana Iyengar, and Michael ScharfSCTP: Michael TuexenDCCP: Eddie Kohler and Yoshifumi Nishida)
Session Description Protocol (SDP) Parameters
"ack" and "nack" Attribute Values	RFC 4585,RFC 8859 First Come First Served with a permanent, stable, and publically accessible document
addrtype	RFC 8866 RFC Required
association-usage Name Registry	RFC 8841 First Come First Served
attribute-name (formerly "att-field")	RFC 8866,RFC 8864,RFC 8859 Specification Required (Expert: Flemming Andreasen)
bwtype	RFC 8866,RFC 8859 Standards Action
Candidate Attribute Extensions	RFC 8839 Specification Required (Expert: Christer Holmberg)
Codec Control Messages	RFC 5104,RFC 8859 Specification Required (Expert: Stephan Wenger)
content SDP Parameters	RFC 4796,RFC 8859 Specification Required (Expert: Christer Holmberg)
"cs-correlation" Attribute Values	RFC 7195,RFC 8859 Specification Required (Expert: Bo Burman)
"depend" SDP Attribute Values	RFC 5583,RFC 8859 Specification Required (Expert: Stephan Wenger)
enckey	RFC 8866 REGISTRY OBSOLETED - No further registrations accepted
Key Methods	RFC 4568 Standards Action
media	RFC 8866 Standards Action
Media Clock Source Parameters	RFC 7273,RFC 8859 Specification Required (Expert: Magnus Westerlund)
Media Stream Transports	RFC 4568 Standards Action
Multiplexing Categories	RFC 8859 Standards Action
nettype	RFC 8866 RFC Required
proto	RFC 8866 RFC Required
QoS Mechanism Tokens	RFC 5432,RFC 8859 Specification Required (Expert: Christer Holmberg)
RID Attribute Parameters	RFC 8851 Specification Required (Expert: Adam Roach)
"rtcp-fb" Attribute Values	RFC 4585,RFC 8859 First Come First Served with permanent, stable, and publically accessible document.
SDP Capability Negotiation Configuration Parameters Registry	RFC 5939,RFC 6871 IETF Review
SDP Capability Negotiation Option Tags	RFC 5939,RFC 8859 IETF Review
SDP/RTSP key management protocol identifiers	RFC 4567,RFC 8859 Specification Required (Expert: Magnus Westerlund)
Semantics for the "group" SDP Attribute	RFC 5888,RFC 8859 Standards Action
Semantics for the "ssrc-group" SDP Attribute	RFC 5576,RFC 8859 Standards Action
SRTP Crypto Suite Registrations	RFC 4568 Standards Action
SRTP Session Parameters	RFC 4568 Standards Action
Timestamp Reference Clock Source Parameters	RFC 7273,RFC 8859 Specification Required (Expert: Magnus Westerlund)
Session Initiation Protocol (SIP) Common Log Format (CLF) Parameters
SIP CLF Transport Flag Values	RFC 6873 IETF Review
SIP CLF Version Values	RFC 6873 Standards Action
Session Initiation Protocol (SIP) Event Types Namespace
Event packages and Event template-packages	RFC 3427,RFC 6665,RFC 5727 event template packages: Standards Action. event packages: RFC Required with Designated Expert. (Expert: Adam Roach)
Session Initiation Protocol (SIP) Parameters
Compression Schemes	RFC 3486 Standards Action
Geolocation-Error Codes	RFC 6442 Specification Required (Expert: Unassigned)
Global Feature-Capability Indicator Registration Tree	RFC 6809 Specification Required (Expert: Paul Kyzivat (primary), Christer Holmberg (secondary))
Header Field Parameters and Parameter Values	RFC 3968 IETF Review
Header Fields	RFC 3261,RFC 3427,RFC 5727 Informational Header: Expert Review. Standard Header: Standards Action. (Expert: Adam Roach)
Identity Parameters	RFC 8224 Standards Action
Identity-Info Algorithm Parameter Values	RFC 8224 Deprecated and closed per RFC8224
Info Packages Registry	RFC 6086 Specification Required (Expert: Adam Roach)
Methods and Response Codes	RFC 3261,RFC 5727 Standards Action
Option Tags	RFC 3261,RFC 5727 Standards Action
Precondition Types Used with SIP	RFC 4032,RFC 3312 Standards Action
Preemption Namespaces	RFC 4411 Standards Action
Priority Header Field Values	RFC 6878 IETF Review
Proxy-Feature Feature-Capability Indicator Trees	RFC 6809 Standards Action
Push Notification Service (PNS)	RFC 8599 Specification Required (Expert: Christer Holmberg)
Reason Codes	RFC 6665 Standards Action
Reason Protocols	RFC 3326 Specification Required (Expert: Christer Holmberg)
Resource-Priority Namespaces	RFC 4412,RFC 7134 IETF Review
Resource-Priority Priority-values	RFC 4412,RFC 7134 IETF Review
Response Codes	RFC 3261 RFC Required
Security Mechanism Names	RFC 3329 IETF Review
Service-ID/Application-ID Labels	RFC 6050 Specification Required (Expert: Unassigned)
SIP AlertMsg-Error Codes	RFC 8876 Specification Required (Expert: Brian Rosen)
SIP Configuration Profile Types	RFC 6080 Specification Required (Expert: Unassigned)
SIP Feature-Capability Indicator Registration Tree	RFC 6809 IETF Review
SIP Forum User Agent Configuration Parameters	RFC 6011 begins with 'sfua-': RFC Required. all other names: First Come First Served.
SIP Privacy Header Field Values	RFC 3323 IETF Review
SIP Transport	RFC 7118 Standards Action
SIP/SIPS URI Parameters	RFC 3969,RFC 5727 Standards Action
URI Purposes	RFC 4575 Specification Required (Expert: Unassigned)
UUI Content Parameters	RFC 7433 Standards Action
UUI Encoding Parameters	RFC 7433 Standards Action
UUI Packages	RFC 7433 Standards Action
Warning Codes (warn-codes)	RFC 3261 RFC Required
Session Initiation Protocol (SIP) Privacy Header Values
SIP Privacy Header Values	RFC 3323 IETF Review
Session Peering Provisioning Framework (SPPF) Organization Identifier Type Namespaces
SPPF OrgIdType Namespaces	RFC 7877 RFC Required
Session Traversal Utilities for NAT (STUN) Parameters
STUN Attributes	RFC 8489 0x0000-0x3FFF: IETF Review. 0x4000-0x7FFF: Expert Review. 0x8000-0xBFFF: IETF Review. 0xC000-0xFFFF: Expert Review. (Expert: Dan Wing)
STUN Error Codes	RFC 8489 IETF Review
STUN Methods	RFC 8489,RFC 7983 0x000-0x07F: IETF Review. 0x080-0x0FF: Expert Review. (Expert: Dan Wing)
STUN Password Algorithms	RFC 8489 0x0000-0x7FFF: IETF Review. 0x8000-0xFFFF: Expert Review. (Expert: Dan Wing)
STUN Security Features	RFC 8489 Standards Action
Traversal Using Relays around NAT (TURN) Channel Numbers	RFC 7983,RFC 8656 Standards Action
SFrame
SFrame Cipher Suites	RFC 9605 0-0xEFFF: Specification Required. 0-0xEFFF: Standards Action. 0xF000-0xFFFF: Private Use. (Expert: Richard Barnes (primary), Emad Omara (secondary))
Shim6 Parameters
Shim6 Error Codes	RFC 5533 Standards Action
Shim6 Options	RFC 5533 Standards Action
Shim6 Types	RFC 5533 Standards Action
Shim6 Verification Methods	RFC 5533 Standards Action
Sieve Extensions
ManageSieve Capabilities	RFC 5804 Standards Track or IESG-Approved Experimental RFC
ManageSieve Response Codes	RFC 5804 Standards Track or IESG-Approved Experimental RFC
Notification-Capability Parameters	RFC 5435 Vendor-controlled: First Come First Served. IETF-controlled: Specification Required. (Expert: Barry Leiba, Alexey Melnikov)
Sieve Actions	RFC 9122 Expert Review (Expert: Alexey Melnikov, Ken Murchison)
Sieve Environment Items	RFC 5183 name begins with "vnd.": First Come First Served. standardized (no "vnd." prefix): Standards track or experimental RFC.
Sieve Extensions	RFC 5228 vendor-controlled (name begins with "vnd."): First Come First Served. IETF-controlled (no "vnd." prefix): Standards track or IESG-approved experimental RFC.
Sieve Notification Mechanisms	RFC 5435 Vendor-controlled: First Come First Served. IETF-controlled: Specification Required. (Expert: Unassigned)
Sieve URN Parameters	RFC 6134 Specification Required (Expert: Unassigned)
SIG (0) Algorithm Numbers
SIG (0) Algorithm Numbers	RFC 3755 Standards Action
Signaling Compression (SigComp) Registry
SigComp_version Namespace	RFC 3320 Standards Action
Signaling User Adaptation Layer Assignments
Message Classes	RFC 3057,RFC 4233 IETF Review
Message Parameters	RFC 3331,RFC 4233,RFC 4666 IETF Review
Message Types - ASP State Maintenance (ASPSM) Messages (Value 3)	RFC 4233,RFC 3331,RFC 4666,RFC 3868,RFC 4129,RFC 3057 IETF Review
Message Types - ASP Traffic Maintenance (ASPTM) Messages (Value 4)	RFC 4233,RFC 3331,RFC 4666,RFC 3868,RFC 4129,RFC 3057 IETF Review
Message Types - Connection-Oriented Messages (Value 8)	RFC 3868 IETF Review
Message Types - Connectionless Messages (Value 7)	RFC 3868 IETF Review
Message Types - DPNSS/DASS2 Boundary Primitives Transport Messages (Value 13)	RFC 4129 IETF Review
Message Types - Interface Identifier Management (IIM) Messages (Value 10)	RFC 3331 IETF Review
Message Types - M2PA Messages (Value 11)	RFC 4165 IETF Review
Message Types - Management (MGMT) Message (Value 0)	RFC 4233,RFC 3331,RFC 4666,RFC 3868,RFC 4129,RFC 3057 IETF Review
Message Types - MTP2 User Adaptation (MAUP) Messages (Value 6)	RFC 3331 IETF Review
Message Types - Q.921/Q.931 Boundary Primitives Transport (QPTM) Messages (Value 5)	RFC 4233 IETF Review
Message Types - Routing Key Management (RKM) Messages (Value 9)	RFC 4666 IETF Review
Message Types - Security Messages (Value 12)	RFC 3788 IETF Review
Message Types - SS7 Signalling Network Management (SSNM) Messages (Value 2)	RFC 4666,RFC 3868 IETF Review
Message Types - Transfer Messages (Value 1)	RFC 4666 IETF Review
Message Types - V5 Boundary Primitives Transport (V5PTM) Messages (Value 14)	RFC 3807 IETF Review
Simple Authentication and Security Layer (SASL) Mechanisms
SASL Mechanisms	RFC 4422 First Come First Served for mechanisms.Expert Review with mailing list for family name registrations.For names beginning with "GS2-", see RFC 5801. For names beginning with "SCRAM-", see RFC7677. (Expert: Simon Josefsson)
SASL SCRAM Family Mechanisms	RFC 7677 IETF Review with mailing list
Simple Certificate Enrollment Protocol (SCEP)
SCEP CA Capabilities	RFC 8894 IETF Review
SCEP Message Types	RFC 8894 Specification Required (Expert: Peter Gutmann)
Simple Gateway Monitoring Protocol (SGMP) Vendor Specific Codes (Obsolete)
SGMP Vendor Specific Codes (Obsolete)	RFC 1028 No further registrations
Simple Mail Transfer Protocol (SMTP) Enhanced Status Codes Registry
Class Sub-Codes	RFC 5248 Specification Required (Expert: Chris Newman)
Enumerated Status Codes	RFC 5248 Specification Required (Expert: Chris Newman)
Subject Sub-Codes	RFC 5248 Specification Required (Expert: Chris Newman)
Simple Network Management Protocol (SNMP) Number Spaces
Message Processing Models	RFC 3411 Standards Action
Security Models	RFC 3411 Standards Action
SNMP Transport Domains	RFC 2578,RFC 3417,RFC 5590 Specification Required (Expert: Unassigned)
SnmpAuthProtocols	RFC 3411 Standards Action
SnmpEngineID Formats	RFC 3411,RFC 5343 1-127: Specification Required. 128-255: Enterprise-specific. (Expert: Unassigned)
SnmpPrivProtocols	RFC 3411 Standards Action
Simple Two-way Active Measurement Protocol (STAMP)
Return Path Control Code Flags	RFC 9503 31-12: IETF Review. 11-8: First Come First Served. 7-4: Experimental Use. 3-0: Private Use.
Return Path Sub-TLV Types	RFC 9503 1-175: IETF Review. 176-239: First Come First Served. 240-251: Experimental Use. 252-254: Private Use.
STAMP Return Codes	RFC 8972 1-127: IETF Review. 128-239: First Come First Served. 240-249: Experimental Use. 250-254: Private Use.
STAMP Sub-TLV Types	RFC 8972 1-175: IETF Review. 176-239: First Come First Served. 240-251: Experimental Use. 252-254: Private Use.
STAMP Synchronization Sources	RFC 8972 1-127: IETF Review. 128-239: First Come First Served. 240-249: Experimental Use. 250-254: Private Use.
STAMP Timestamping Methods	RFC 8972 1-127: IETF Review. 128-239: First Come First Served. 240-249: Experimental Use. 250-254: Private Use.
STAMP TLV Flags	RFC 8972 IETF Review
STAMP TLV Types	RFC 8972 1-175: IETF Review. 176-239: First Come First Served. 240-251: Experimental Use. 252-254: Private Use.
SMTP MTA Strict Transport Security (MTA-STS)
MTA-STS Policy Fields	RFC 8461 Expert Review (Expert: Unassigned)
MTA-STS TXT Record Fields	RFC 8461 Expert Review (Expert: Unassigned)
Snoop Datalink Types
Datalink Types	RFC 3827 0-26: Reserved. 27-4294967295: First Come First Served.
SOCKS Methods
SOCKS Method Values	RFC 1928 IESG Approval
Software ID Values
Software ID Entity Role Values	RFC 9393 0-127: Standards Action with Expert Review. 128-255: Specification Required. (Expert: Charles Schmidt, Jessica Fitzgerald-McKay, Henk Birkholz)
Software ID Link Ownership Values	RFC 9393 0-127: Standards Action with Expert Review. 128-255: Specification Required. (Expert: Charles Schmidt, Jessica Fitzgerald-McKay, Henk Birkholz)
Software ID Link Relationship Values	RFC 9393 0-32767: Standards Action with Expert Review. 32768-65535: Specification Required. (Expert: Charles Schmidt, Jessica Fitzgerald-McKay, Henk Birkholz)
Software ID Link Use Values	RFC 9393 0-127: Standards Action with Expert Review. 128-255: Specification Required. (Expert: Charles Schmidt, Jessica Fitzgerald-McKay, Henk Birkholz)
Software ID Version Scheme Values	RFC 9393 0-16383: Standards Action with Expert Review. 16384-65535: Specification Required. (Expert: Charles Schmidt, Jessica Fitzgerald-McKay, Henk Birkholz)
Special People Numbers Registry (SPNR)
Special People Numbers Registry	Not an IETF Registry. Contact IANA
Special-Purpose Autonomous System (AS) Numbers
Special-Purpose AS Numbers	RFC 7249 IETF Review
Special-Use Domain Names
Special-Use Domain Names	RFC 6761 Standards Action or IESG Approval
STARTTLS Validation Result Types
STARTTLS Validation Result Types	RFC 8460 Expert Review (Expert: Alexander Brotman, Daniel Margolis, Viktor Dukhovni)
Straightforward-NAPTR (S-NAPTR) Parameters
S-NAPTR Application Protocol Tags	RFC 3958,RFC 4848 Specification Required in form of an RFC (Expert: Jouni Korhonen)
S-NAPTR Application Service Tags	RFC 3958,RFC 4848 Specification Required in form of an RFC (Expert: Jouni Korhonen)
Stream Control Transmission Protocol (SCTP) Parameters
Adaptation Code Points	RFC 5061 IETF Review
Chunk Flags	RFC 9260 RFC Required
Chunk Parameter Types	RFC 9260 IETF Review
Chunk Types	RFC 9260 IETF Review
Error Cause Codes	RFC 9260 Specification Required (Expert: Michael Tuexen, Randall Stewart)
Error Detection Methods	RFC 9653 Specification Required (Expert: Michael Tuexen, Magnus Westerlund)
Hashed Message Authentication Code (HMAC) Identifiers	RFC 4895 Specification Required (Expert: Unassigned)
SCTP Payload Protocol Identifiers	RFC 9260 First Come First Served
Stringprep Profiles
Stringprep Profiles	RFC 3454 IETF Review
Structure of Management Information (SMI) Numbers (MIB Module Registrations)
Interface Types (ifType)	RFC 1213,RFC 2863,RFC 7224,RFC 8892 Expert Review (Expert: Dave Thaler (primary), Dan Romascanu (secondary))
Internet-standard MIB - Mail Monitoring
Internet-standard MIB - Network Services Monitoring
IPFIX-SELECTOR-MIB Functions	RFC 6615 Expert Review (Expert: Unassigned)
MIB - Remote Network Monitoring	RFC 2819,RFC 3737 Standards Action
SMI Experimental Codes	RFC 4181,RFC 2578,RFC 1155 Experimental RFC
SMI Features	RFC 2506 Not Defined ?
SMI mail Codes	Not Defined ?
SMI mib-2 snanauMIB Codes	RFC 1666 Not Defined ?
SMI Network Management Directory Codes
SMI Network Management MGMT Codes	RFC 2578 Not Defined ?
SMI pib PIB Codes	RFC 3159 Standards Action
SMI Private Codes	RFC 2578 For Private Enterprise Number (PEN) registration (prefix 1.3.6.1.4.1), see .
SMI Security Codes (including S/MIME, PKIX and LTANS)	Not Defined ?
SMI Security for Cryptographic Algorithms	RFC 8411 Specification Required (Expert: Russ Housley (primary), Sean Turner (secondary))
SMI Security for Name System Designators Codes (nametypes)	Not Defined ?
SMI Security Services Codes	IETF Review
SMI SNMPv2 Codes	RFC 2578,RFC 1902 IETF Review
SNMP Management Architecture - Message Processing Subsystem (SnmpMessageProcessingModel)
SNMP Management Architecture - Security Subsystem (SnmpSecurityModel)
SNMP-TLSTM HashAlgorithms	RFC 9456 Expert Review (Expert: Russ Housley, Sean Turner)
spdActions	RFC 4807 Specification Required (Expert: Wes Hardaker)
Transmission Number Values	RFC 1213,RFC 8892 Specification Required (Expert: Dave Thaler (primary), Dan Romascanu (secondary))
Tunnel Types (tunnelType)	RFC 4087,RFC 8675,RFC 8892 Expert Review (Expert: Dave Thaler (primary), Dan Romascanu (secondary))
Structured Data Exchange Format (SDXF)
Compression Methods for SDXF	RFC 3072 RFC or equivalent
Encryption Methods for SDXF	RFC 3072 RFC or equivalent
Subsequent Address Family Identifiers (SAFI) Parameters
SAFI Values	RFC 4760 1-63: Standards Action. 64-127: First Come First Served. 128-240: Some recognized assignments below, others Reserved. 241-254: Reserved for Private Use.
SUN Remote Procedure Call (RPC) Numbers - Obsolete
SUN RPC Numbers	RFC 1831
syslog Parameters
syslog Message Facilities	RFC 5424 IETF Review
syslog Message Severities	RFC 5424 IETF Review
syslog Structured Data ID Values	RFC 5424 IETF Review
syslog Version Values	RFC 5424 Standards Action
syslog-sign Hash Algorithm Values	RFC 5848 IETF Review
syslog-sign Key Blob Type Values	RFC 5848 IETF Review
syslog-sign Protocol Version Values	RFC 5848 IETF Review
syslog-sign SG Field Values	RFC 5848 IETF Review
syslog-sign Signature Scheme Values	RFC 5848 IETF Review
System for Cross-domain Identity Management (SCIM) Schema URIs
SCIM Schema URIs for Data Resources	RFC 7643 Expert Review (Expert: Phil Hunt, Morteza Ansari)
SCIM Server-Related Schema URIs	RFC 7643 Expert Review (Expert: Phil Hunt, Morteza Ansari)
T
TCP Convert Protocol (Convert) Parameters
Convert Errors	RFC 8803 1-127: IETF Review. 128-191: Specification Required. 192-255: Private Use. (Expert: Mohamed Boucadair (primary), Olivier Bonaventure (secondary))
Convert TLVs	RFC 8803 1-127: IETF Review. 128-191: Specification Required. 192-255: Private Use. (Expert: Mohamed Boucadair (primary), Olivier Bonaventure (secondary))
Convert Versions	RFC 8803 IETF Review
Telephony Routing over IP (TRIP) Parameters
TRIP Address Families	RFC 3219 Expert Review (Expert: Jonathan Rosenberg)
TRIP Application Protocols	RFC 3219 Expert Review (Expert: Jonathan Rosenberg)
TRIP Attributes	RFC 3219 Specification Required (Expert: Unassigned)
TRIP Capabilities	RFC 3219 Specification Required (Expert: Unassigned)
TRIP IP Telephony Administrative Domain (ITAD) Numbers	RFC 3219,RFC 8602 First Come First Served
Telnet Options
CAST5_40_CFB64 (Type 8) and CAST128_CFB64 (Type 10) Telnet Encryption Types	RFC 2950 First Come First Served
CAST5_40_OFB64 (Type 9) and CAST128_OFB64 (Type 11) Telnet Encryption Types	RFC 2949 First Come First Served
DES3_CFB64 Telnet Encryption Type (Type 3)	RFC 2947 First Come First Served
DES3_OFB64 Telnet Encryption Type (Type 4)	RFC 2948 First Come First Served
DES_CFB64 Telnet Encryption Type (Type 1)	RFC 2952 First Come First Served
DES_OFB64 Telnet Encryption Type (Type 2)	RFC 2953 First Come First Served
DSS Authentication Type (Type 14)	RFC 2943 Specification Required (Expert: Unassigned)
KEA_SJ (Type 12) and KEA_SJ_INTEG (Type 13) Authentication Types	RFC 2951 Specification Required (Expert: Unassigned)
KERBEROS_V4 Telnet Authentication Type (Type 1)	RFC 1411 First Come First Served
KERBEROS_V5 Telnet Authentication Type (Type 2)	RFC 2942 Specification Required (Expert: Unassigned)
SRP Telnet Authentication Type (Type 5)	RFC 2944 Specification Required (Expert: Unassigned)
Telnet Authentication Types (Option 37)	RFC 2941 First Come First Served
Telnet Encryption Types (Option 38)	RFC 2946 First Come First Served
Telnet Options	RFC 855 IETF Review
Terminal Type Names
Terminal Type Names	RFC 1091 Not defined?
The Binary Floor Control Protocol (BFCP) Parameters
Attributes	RFC 8855 Specification Required (Expert: Brian Rosen, Tom Kristensen)
Error Codes	RFC 8855 Specification Required (Expert: Brian Rosen, Tom Kristensen)
Primitives	RFC 8855 Specification Required (Expert: Brian Rosen, Tom Kristensen)
Request Statuses	RFC 8855 Specification Required (Expert: Brian Rosen, Tom Kristensen)
The Extensible Authentication Protocol Mechanism for the Generic Security Service Application Programming Interface (GSS-EAP) Parameters
GSS-EAP Context Flags	RFC 7055 IETF Review or IESG Approval
GSS-EAP Error Codes	RFC 7055 0-127: Standards Action. 128-255: Specification Required. (Expert: Joseph Salowey)
GSS-EAP Subtoken Types	RFC 7055 Expert Review (Expert: Joseph Salowey)
Time Zone Data Distribution Service (TZDIST) Parameters
TZDIST Identifiers	RFC 7808 IETF Review
TZDIST Service Actions	RFC 7808 Specification Required (Expert: Michael Douglass)
Timed Efficient Stream Loss-tolerant Authentication (TESLA) Parameters
Cryptographic Message Authentication Code (MAC) Function, TESLA-MAC Values	RFC 4442 Expert Review (Expert: MSEC working group or its designated successor)
Cryptographic Pseudo-Random Function, TESLA-PRF Values	RFC 4442 Expert Review (Expert: MSEC working group or its designated successor)
Signature Cryptographic Function, TESLA-SIG-CRYPTO-FUNC Values	RFC 5776 Expert Review (Expert: MSEC working group or its designated successor)
Signature Encoding Algorithm, TESLA-SIG-ALGO Values	RFC 5776 Expert Review (Expert: MSEC working group or its designated successor)
TLS-based Posture Transport Protocol (PT-TLS)
PT-TLS Error Codes	RFC 6876 Specification Required (Expert: Unassigned)
PT-TLS Message Types	RFC 6876 Specification Required (Expert: Unassigned)
Token Binding Protocol
Token Binding Extensions	RFC 8471 Specification Required (Expert: Andrei Popov, Dirk Balfanz)
Token Binding Key Parameters	RFC 8471 Specification Required (Expert: Andrei Popov, Dirk Balfanz)
Token Binding Types	RFC 8471 Specification Required (Expert: Andrei Popov, Dirk Balfanz)
Trailer Types
Trailer Types	RFC 6081 Specification Required (Expert: Unassigned)
Transfer Encodings
Transfer Encodings	RFC 4289 Standards Action
Transmission Control Protocol (TCP) Header Flags
TCP Header Flags	RFC 9293 Standards Action
Transmission Control Protocol (TCP) Parameters
Cryptographic Algorithms for TCP-AO Registration	RFC 5926 RFC Publication After Expert Review
MPTCP Handshake Algorithms	RFC 8684 Standards Action
MPTCP MP_TCPRST Reason Codes	RFC 8684 Specification Required (Expert: Unassigned)
MPTCP Option Subtypes	RFC 8684 Standards Action
TCP Alternate Checksum Numbers	RFC 1146 Not defined
TCP Encryption Protocol Identifiers	RFC 8547 IETF Review or Expert Review with RFC Required (Expert: Unassigned)
TCP Header Flags	RFC 9293 Standards Action
TCP Option Kind Numbers	RFC 2780 Standards Action or IESG Approval
TCP/UDP Experimental Option Experiment Identifiers (TCP/UDP ExIDs)	RFC 6994,Internet Draft draft-ietf-tsvwg-udp-options-45 First Come First Served
tcpcrypt AEAD Algorithms	RFC 8548 IETF Review or Expert Review with RFC Required (Expert: Unassigned)
Transparent Interconnection of Lots of Links (TRILL) Parameters
Extended RBridge Channel Payload Types	RFC 7978 IETF Review
Extended RBridge Channel Security Types	RFC 7978 IETF Review
Interested Labels Flag Bits	RFC 7176,RFC 7357 IETF Review
Interested VLANs Flag Bits	RFC 7176,RFC 7357 IETF Review
PORT-TRILL-VER Sub-TLV Capability Flags	RFC 7176 IETF Review
RBridge Channel Error Codes	RFC 7178 Standards Action
RBridge Channel Header Flags	RFC 7178 IETF Review
RBridge Channel Protocols	RFC 7178 0x002-0x0FF: Standards Action. 0x100-0xFF7: RFC Required. 0x100-0xFF7: IESG Approval.
TRILL APPsub-TLV Types under IS-IS TLV 251 Application Identifier 1	RFC 7357 IETF Review with additional requirements on the documentation of the use being registered as specified in Section 7.2 ofRFC 7357.
TRILL Ethertypes	RFC 8377 Ethertypes are assigned by the IEEE Registration Authority. Updates to this registry are coordinated with the designated expert. (Expert: Donald Eastlake (primary), Sue Hares (secondary))
TRILL Extended Header Flags	RFC 7179 IETF Review
TRILL Multicast Addresses	RFC 6325 IETF Review
TRILL Neighbor TLV NEIGHBOR RECORD Flags	RFC 7176 Standards Action
TRILL Nicknames	RFC 6325 RFC Required (single value) or IETF Review (single or multiple values)
TRILL OAM Return Codes	RFC 7455 Standards Action
TRILL Pull Directory Errors	RFC 8171 IETF Review
TRILL Pull Directory Query Types (QTYPEs)	RFC 8171 IETF Review
TRILL-VER Sub-TLV Capability Flags	RFC 7176 IETF Review
Transport Layer Security (TLS)
TLS Alerts	RFC 8446 Standards Action
TLS Application-Layer Protocol Negotiation (ALPN) Protocol IDs	RFC 7301,RFC 8447 Expert Review (Expert: Yoav Nir, Rich Salz, Nick Sullivan)
TLS Authorization Data Formats	RFC 5878,RFC 8447 0-63: IETF Review. 64-223: Specification Required. 224-255: Reserved for Private Use. (Expert: Yoav Nir, Rich Salz, Nick Sullivan)
TLS CachedInformationType Values	RFC 7924 0-63: Standards Action. 64-223: Specification Required. (Expert: Yoav Nir, Rich Salz, Nick Sullivan)
TLS Certificate Compression Algorithm IDs	RFC 8879 1-255: IETF Review. 256-16383: Specification Required. 16384-65535: Experimental Use. (Expert: Yoav Nir, Rich Salz, Nick Sullivan)
TLS Certificate Status Types	RFC 6961,RFC 8446 IETF Review
TLS Certificate Types	RFC 6091,RFC 8446,RFC 8447 Specification Required (Expert: Yoav Nir, Rich Salz, Nick Sullivan)
TLS Cipher Suites	RFC 8446,RFC 8447,RFC 9147 Specification Required (Expert: Yoav Nir, Rich Salz, Nick Sullivan)
TLS ClientCertificateType Identifiers	RFC 5246,RFC 8447 0-63: Standards Action. 64-223: Specification Required. 224-255: Reserved for Private Use. (Expert: Yoav Nir, Rich Salz, Nick Sullivan)
TLS Compression Method Identifiers	RFC 3749,RFC 8447 0-63: Standards Action. 64-223: Specification Required. 224-255: Reserved for Private Use. (Expert: Yoav Nir, Rich Salz, Nick Sullivan)
TLS ContentType	RFC 8446,RFC 9443 Standards Action
TLS EC Curve Types	RFC 8422 Specification Required (Expert: Yoav Nir, Rich Salz, Nick Sullivan)
TLS EC Point Formats	RFC 8422 Specification Required (Expert: Yoav Nir, Rich Salz, Nick Sullivan)
TLS Exporter Labels	RFC 5705,RFC 8447 Specification Required (Expert: Yoav Nir, Rich Salz, Nick Sullivan)
TLS ExtensionType Values	RFC 8446,RFC 8447,RFC 9146 Specification Required (Expert: Yoav Nir, Rich Salz, Nick Sullivan)
TLS HandshakeType	RFC 8446 Standards Action
TLS HashAlgorithm	RFC 5246,RFC 8447,RFC 9155 0-63: Standards Action. 64-223: Specification Required. 224-255: Reserved for Private Use. (Expert: Yoav Nir, Rich Salz, Nick Sullivan)
TLS Heartbeat Message Types	RFC 6520,RFC 8447 Expert Review (Expert: Yoav Nir, Rich Salz, Nick Sullivan)
TLS Heartbeat Modes	RFC 6520,RFC 8447 Expert Review (Expert: Yoav Nir, Rich Salz, Nick Sullivan)
TLS KDF Identifiers	RFC 9258 0x0000-0xfeff: Specification Required. 0xff00-0xffff: Private Use. (Expert: Rich Salz, Nick Sullivan)
TLS PskKeyExchangeMode	RFC 8446 Specification Required (Expert: Yoav Nir, Rich Salz, Nick Sullivan)
TLS SignatureAlgorithm	RFC 5246,RFC 8447,RFC 9155 0-63: Standards Action. 64-223: Specification Required. 224-255: Reserved for Private Use. (Expert: Yoav Nir, Rich Salz, Nick Sullivan)
TLS SignatureScheme	RFC 8446 Specification Required (Expert: Yoav Nir, Rich Salz, Nick Sullivan)
TLS Supplemental Data Formats (SupplementalDataType)	RFC 4680,RFC 8447 0-16385: Standards Action. 16386-65279: IETF Review. 65280-65535: Reserved for Private Use.
TLS Supported Groups	RFC 8422,RFC 7919,RFC 8446,RFC 8447 0-255, 512-65535: Specification Required. 256-511: Specification Required. (Expert: Yoav Nir, Rich Salz, Nick Sullivan)
TLS UserMappingType Values	RFC 4681 0-63: Standards Action. 64-223: Specification Required. 224-255: Reserved for Private Use. (Expert: Yoav Nir, Rich Salz, Nick Sullivan)
Tunnel Setup Protocol (TSP) Parameters
Tunnel Types	RFC 5572 First Come First Served
Two-way Active Measurement Protocol (TWAMP) Parameters
TWAMP-Control Command Numbers	RFC 5357,RFC 5938 IETF Review
TWAMP-Modes	RFC 5618,RFC 5938,RFC 7717 IETF Review
U
Unidirectional Lightweight Encapsulation (ULE) Next-Header Registry
Mandatory Extension Headers (or link-dependent type fields) for ULE (Range 0-255 decimal)	RFC 4326,RFC 7280 Specification Required (Expert: Gorry Fairhurst)
Optional Extension Headers for ULE (Range 256-511 decimal)	RFC 4326,RFC 7280 Specification Required (Expert: Gorry Fairhurst)
Uniform Resource Identifier (URI) Schemes
"about" URI Tokens	RFC 6694 First Come First Served
'geo' URI 'crs' Parameter Values	RFC 5870 IESG Approval with Specification Required
'geo' URI Parameters	RFC 5870 Specification Required (Expert: Unassigned)
'ipn' Scheme URI Allocator Identifiers	Internet Draft draft-ietf-dtn-ipn-update-14 0-0xFFFF: Expert Review. 0x10000-0x3FFFFFFF: Expert Review. 0x40000000-0x7FFFFFFF: Experimental Use. 0x80000000-0xFFFFFFFF: Reserved. >=0x100000000: Reserved. (Expert: Edward Birrane, Rick Taylor)
'ipn' Scheme URI Default Allocator Node Numbers	RFC 7116,Internet Draft draft-ietf-dtn-ipn-update-14 1-0x3FFF: Private Use. 0x4000-0xFFFFFFFE: Expert Review. >=0x100000000: Invalid. (Expert: Marc Blanchet, Keith Scott)
'ipn' Scheme URI Well-known Service Numbers for BPv7	Internet Draft draft-ietf-dtn-ipn-update-14 1-127: Private Use. 128-255: Standards Action. 0x0100-0x7FFF: Private Use. 0x8000-0xFFFF: Specification Required. 0x10000-0xFFFFFFFF: Private Use. greater than 0x100000000: Reserved for future expansion. (Expert: Edward Birrane, Rick Taylor, Brian Sipos)
POSH Service Names	RFC 7711 Expert Review or IETF Review (Expert: Unassigned)
tel URI Parameters	RFC 5341 Specification Required (Expert: Vijay Gurbani)
Uniform Resource Identifier (URI) Schemes	RFC 7595,RFC 8615 Permanent: Expert Review. Provisional: First Come First Served. Historical: Expert Review. (Expert: Graham Klyne)
Well-Known URIs	RFC 8615 Specification Required (Expert: Mark Nottingham)
Uniform Resource Name (URN) Namespace for IETF Use
IETF URN Sub-namespace for Registered Protocol Parameter Identifiers	RFC 3553 IETF Review
IETF URN Sub-namespaces	RFC 6924 IETF Review
Uniform Resource Names (URN)
Alert URN Identifiers	RFC 7462 Specification Required (Expert: Dale Worley)
Alert URN Providers	RFC 7462 First Come First Served
Formal URN Namespaces	RFC 8141 Expert Review, per Section 6 ofRFC 8141. Fast-track procedure for standards organizations described in Section 6.3. (Expert: Peter Saint-Andre (team leader), Dale Worley, Juha Hakala, Stephanie Palek, Lars Svensson, Jyrki Ilva)
Informal URN Namespaces	RFC 8141 Expert Review, per Section 6 ofRFC 8141. (Expert: Peter Saint-Andre (team leader), Dale Worley, Juha Hakala, Stephanie Palek)
URN Service Labels	RFC 5031 Standards Action
User Datagram Protocol (UDP)
TCP/UDP Experimental Option Experiment Identifiers (TCP/UDP ExIDs)	RFC 6994,Internet Draft draft-ietf-tsvwg-udp-options-45
UDP Option Kind Numbers	Internet Draft draft-ietf-tsvwg-udp-options-45 Standards Action or IESG Approval
UUID
UUID Namespace IDs	RFC 9562 Specification Required (Expert: Kyzer Davis, Brad Peabody)
UUID Subtypes	RFC 9562 Standards Action With Expert Review (Expert: Kyzer Davis, Brad Peabody)
V
vCard Elements
vCard Parameter Values	RFC 6350 Expert Review and RFC Required (Expert: Primary: Simon Perreault; Backup: Peter Saint-Andre)
vCard Parameters	RFC 6350 No namespace specified: Expert Review and RFC Required. Vendor namespace specified: First Come First Served. (Expert: Primary: Simon Perreault; Backup: Peter Saint-Andre)
vCard Properties	RFC 6350 No namespace specified: Expert Review and RFC Required. Vendor namespace specified: First Come First Served. (Expert: Primary: Simon Perreault; Backup: Peter Saint-Andre)
vCard Property Values	RFC 6350 Expert Review and RFC Required (Expert: Primary: Simon Perreault; Backup: Peter Saint-Andre)
vCard Value Data Types	RFC 6350 Expert Review and RFC Required (Expert: Primary: Simon Perreault; Backup: Peter Saint-Andre)
VCDIFF Secondary Compressor ID Values
VCDIFF Secondary Compressor ID Values	RFC 3284 RFC or peer-reviewed permanent and readily available reference.Subject to the above, name assignments are First Come First Served.
Vectors of Trust (VoT)
Vectors of Trust Components	RFC 8485 Specification Required (Expert: Justin Richer, Leif Johansson)
'version' symbols used within the ISUP and QSIG
application/ISUP symbols	RFC 3204 Expert Review (Expert: Jon Peterson)
application/QSIG symbols	RFC 3204 Expert Review (Expert: Jon Peterson)
Virtual Network Computing (VNC) Uniform Resource Identifier (URI)
VNC URI Connection Channel Types	RFC 7869 First Come First Served
VNC URI ID Hash Algorithms	RFC 7869 First Come First Served
VNC URI Parameters	RFC 7869 First Come First Served
W
WAVE and AVI Codec Registries (Historic Registry)
WAVE and AVI Codec Registries	RFC 2361 IANA does not assign. Republication of values.
Web Authentication (WebAuthn)
WebAuthn Attestation Statement Format Identifiers	RFC 8809 Specification Required (Expert: Mike Jones, Giridhar Mandyam)
WebAuthn Extension Identifiers	RFC 8809 Specification Required (Expert: Mike Jones, Giridhar Mandyam)
Web Push Parameters
VAPID Authentication Scheme Parameters	RFC 8292 Specification Required (Expert: Martin Thomson)
Web Push Identifiers	RFC 8030 IETF Review
Webfinger Parameters
Webfinger Properties	RFC 7033 Expert Review (Expert: Unassigned)
WebRTC-HTTP Ingestion Protocol (WHIP)
WebRTC-HTTP Ingestion Protocol (WHIP) Extension URNs	RFC 9725 Specification Required (Expert: Unassigned)
WebRTC-HTTP Ingestion Protocol (WHIP) URNs	RFC 9725 Specification Required (Expert: Unassigned)
WebSocket Protocol Registries
WebSocket Close Code Number Registry	RFC 6455 1000-2999: Standards Action, Specification Required or IESG Review. 3000-3999: First Come First Served. (Expert: Alexey Melnikov)
WebSocket Extension Name Registry	RFC 6455 First Come First Served
WebSocket Framing Header Bits Registry	RFC 6455 Standards Action
WebSocket Opcode Registry	RFC 6455 Standards Action
WebSocket Subprotocol Name Registry	RFC 6455,RFC 7936,RFC 8864 First Come First Served
WebSocket Version Number Registry	RFC 6455 Standard Version Numbers: IETF Review. Interim Version Numbers: Expert Review. (Expert: HYBI WG Chairs)
Wrapped Encapsulating Security Payload (WESP) Flags
WESP Flags	RFC 5840 IETF Review
WESP Version Numbers	RFC 5840 Standards Action
X
X.25 Type Numbers
X.25 Type Numbers	Not assigned by IANA
Xerox Network System (XNS) Protocol Types
Assigned internet packet types	Not assigned by IANA
Assigned well-known socket numbers	Not assigned by IANA
XML Evidence Record Syntax (XMLERS)
Cryptographic Information Type	RFC 6283 RFC Required
Time-Stamp Token Type	RFC 6283 RFC Required
XML Security URIs
XML Security URIs	RFC 9231 Specification Required (Expert: Donald Eastlake, Alexey Melnikov)
Y
YANG Geographic Location Parameters
Geodetic System Values	RFC 9179 First Come First Served
YANG Module Tags
IETF YANG Module Tags	RFC 8819 IETF Review
YANG Module Tag Prefixes	RFC 8819 Specification Required (Expert: Christian Hopps, Lou Berger, Dean Bogdanovic)
YANG Modules
iana-bfd-types YANG Module	RFC 9127,RFC 5880 See BFD Diagnostic Codes and BFD Authentication Types registries.
iana-bgp-l2-encaps YANG Module	RFC 9291,RFC 6624 See BGP Layer 2 Encapsulation Types registry.
iana-crypt-hash YANG Module	RFC 7317 Expert Review (Expert: Kent Watsen)
iana-dns-class-rr-type YANG Module	RFC 9108 See DNS CLASSes and Resource Record (RR) TYPEs registries.
iana-dots-signal-channel YANG Module	RFC 9132 See the DOTS Status Codes, DOTS Conflict Status Codes, DOTS Conflict Cause Codes, and DOTS Attack Status Codes registries.
iana-hardware YANG Module	RFC 8348 See IANA-ENTITY-MIB MIB module.
iana-if-type YANG Module	RFC 1213,RFC 2863,RFC 7224,RFC 8892 This is one of the available formats of the Interface Types (ifType) registry.
iana-msd-types YANG Module	RFC 9702 See the IGP MSD-Types registry.
iana-pseudowire-types YANG Module	RFC 9291,RFC 4446 See MPLS Pseudowire Types registry.
iana-routing-types YANG Module	RFC 8294,RFC 2453,RFC 2677,RFC 2858,RFC 4760 See Address Family Numbers and Subsequent Address Family Identifiers (SAFI) Values registries.
iana-ssh-encryption-algs YANG Module	RFC 9644 See the Encryption Algorithm Names registry.
iana-ssh-key-exchange-algs YANG Module	RFC 9644 See the Key Exchange Method Names registry.
iana-ssh-mac-algs YANG Module	RFC 9644 See the MAC Algorithm Names registry.
iana-ssh-public-key-algs YANG Module	RFC 9644 See the Public Key Algorithm Names registry.
iana-tls-cipher-suite-algs YANG Module	RFC 9645 See the TLS Cipher Suites registry.
iana-tunnel-type YANG Module	RFC 4087,RFC 8675,RFC 8892 This is one of the available formats of the Tunnel Types (tunnelType) registry.
YANG Parameters
YANG Module Names	RFC 6020,RFC 8407 RFC Required
YANG SIDs
IETF YANG-SID Modules	RFC 9595 Expert Review (Expert: Michel Veillette, Alexander Pelov, Laurent Toutain)
IETF YANG-SID Ranges	RFC 9595 0: IESG Approval. 1000: RFC and Expert Review Required. 60000: Reserved for Experimental Use. 100000: RFC and Expert Review Required. 300000: Reserved. (Expert: Michel Veillette, Alexander Pelov, Laurent Toutain)
YANG-SID Mega-Ranges	RFC 9595 Expert Review (Expert: Michel Veillette, Alexander Pelov, Laurent Toutain)

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Protocol Registries