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Created

2006-01-10

Last Updated

2025-10-09

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Registry Included Below

• IPv6 Special-Purpose Address Space

IPv6 Special-Purpose Address Space

Registration Procedure(s)

IETF Review

Reference

[RFC4773][RFC6890][RFC8190]

Note

Address prefixes listed in the Special-Purpose Address Registry arenot guaranteed routability in any particular local or global context.The IPv4 and IPv6 Special-Purpose Address Registries maintain the following information regarding each entry:   o  Address Block - A block of IPv4 or IPv6 addresses that has been      registered for a special purpose.   o  Name - A descriptive name for the special-purpose address block.   o  RFC - The RFC through which the special-purpose address block was      requested.   o  Allocation Date - The date upon which the special-purpose address      block was allocated.   o  Termination Date - The date upon which the allocation is to be      terminated.  This field is applicable for limited-use allocations      only.   o  Source - A boolean value indicating whether an address from the      allocated special-purpose address block is valid when used as the      source address of an IP datagram that transits two devices.   o  Destination - A boolean value indicating whether an address from      the allocated special-purpose address block is valid when used as      the destination address of an IP datagram that transits two      devices.   o  Forwardable - A boolean value indicating whether a router may      forward an IP datagram whose destination address is drawn from the      allocated special-purpose address block between external      interfaces.   o  Globally Reachable - A boolean value indicating whether an IP       datagram whose destination address is drawn from the allocated       special-purpose address block is forwardable beyond a specified       administrative domain.   o  Reserved-by-Protocol - A boolean value indicating whether the      special-purpose address block is reserved by IP, itself.  This      value is "TRUE" if the RFC that created the special-purpose      address block requires all compliant IP implementations to behave      in a special way when processing packets either to or from      addresses contained by the address block.If the value of "Destination" is FALSE, the values of "Forwardable" and "Globally Reachable" must also be false.

Formerly known as

IANA IPv6 Special-Purpose Address Registry (pursuant to [IESG decision])

Available Formats

CSV

Footnotes

Unless allowed by a more specific allocation.

See Section 5 of [RFC4380] for details.

See [RFC3056] for details.

See [RFC4193] for more details on the routability of Unique-Local addresses.  The Unique-Local prefix is drawn from the IPv6 Global Unicast Address range, but is specified as not globally routed.