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The website screenshot for https://www.master.cz

MasterDC s.r.o.

AS Number24971
Websitehttps://www.master.cz

Registered on
11 Jun 2002 (23 years old)
Registered to
cz.master (ripe)
Network status
Active, Allocated under RIPE
Network type
Content
Prefixes Originated
33 IPv4, 13 IPv6
Prefixes Originated
33 IPv4, 13 IPv6
Addresses Originated
230 /24's of IPv4
1377283 /48's of IPv6

If you are scraping this block for the prefixes that a AS originates, please use the data dumps in https://bgp.tools/kb/api and cache them

 PrefixDescription
5.180.200.0/22Bydzovsky s.r.o.
37.140.220.0/24ProfiSMS s.r.o.
37.205.8.0/22vpsFree.cz, z.s.
37.205.12.0/22-
77.93.192.0/19MasterDC s.r.o.
80.79.16.0/20MasterDC s.r.o.
81.31.32.0/20MasterDC s.r.o.
83.167.224.0/19MasterDC s.r.o.
85.118.128.0/21MasterDC s.r.o.
89.185.224.0/19MasterDC s.r.o.
91.213.160.0/24Internet Info, s.r.o.
91.214.192.0/22QCM, s.r.o.
91.216.179.0/24oXyShop s.r.o.
91.226.216.0/22W HOSTING, s.r.o.
92.63.56.0/24NEW TELEKOM, spol. s r.o.
130.193.16.0/24AUTO GAMES PLUS a.s.
149.62.144.0/21MasterDC s.r.o.
176.227.168.0/23HostingSolutions s.r.o.
178.238.32.0/20MasterDC s.r.o.
185.8.164.0/23vpsFree.cz, z.s.
185.8.166.0/23vpsFree.cz, z.s.
185.32.160.0/22ANAFRA a.s.
185.58.40.0/22MasterDC s.r.o.
185.85.164.0/22ServerNow s.r.o.
185.145.160.0/22Etnetera Core a.s.
185.239.216.0/22AdminIT, s. r. o.
193.169.160.0/23Imarto Inc.
194.145.180.0/22ServerNow s.r.o.
195.140.252.0/22Virtualmaster, s.r.o.
83.223.52.0/24-
185.25.184.0/22NETIO Solutions s.r.o.
188.213.234.0/23NETIO Solutions s.r.o.
188.215.18.0/23NETIO Solutions s.r.o.
2001:678:a50::/48Imarto Inc.
2001:67c:68::/48Internet Info, s.r.o.
2a00:8220::/32NETIO Solutions s.r.o.
2a00:a5a0::/32ANAFRA a.s.
2a01:430::/32MasterDC s.r.o.
2a03:3b40::/40vpsFree.cz - IPv6 - Prague 2
2a03:3b40:100::/40vpsFree.cz - IPv6 - Brno 2
2a03:3b40:200::/39vpsFree.cz, z.s.
2a03:7460::/32ServerNow s.r.o.
2a04:16c0:200::/48-
2a07:4880::/29Etnetera Core a.s.
2a0b:3240::/32Bydzovsky s.r.o.
2a0c:6380::/29AdminIT, s. r. o.

Network PolicyThis info take up to 2 hours to fully update

Click here to learn more about what this graph means and what makes up a network policy
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Prefixes in selected policy

How are upstreams and downstreams calculated?

UpstreamsThis information was fetched live at page load time

 ASNDescriptionIPv4IPv6
AS1299Arelion (fka. Telia Carrier)✔✔
AS9002RETN Limited✔✔
AS197451Brno University of Technology✘✔

PeersThis information was fetched live at page load time

 ASNDescriptionIPv4IPv6
AS1299Arelion (fka. Telia Carrier)✔✔
AS9002RETN Limited✔✔
AS6939Hurricane Electric LLC✔✔
AS207167mapnet IT services s.r.o.✔✔
AS204957GREEN FLOID LLC✔✔
AS48921Yoursafe Holding B.V.✔✔
AS51134Development 777 s.r.o.✔✔
AS211085mapnet IT services s.r.o.✔✔
AS5405Inter.link GmbH✔✔
AS21045K-net Technical International Group, s.r.o.✔✘
AS64481Joint Venture Dragon Capital LLC✔✘
AS6204INTERKVM HOST SRL✔✔
AS24940Hetzner Online GmbH✔✔
AS8218Zayo Europe✔✔
AS50629LWLcom GmbH✔✔
AS20562Open Peering (Broadband Hosting B.V.)✔✔
AS33891Core-Backbone GmbH✔✔
AS14840BR.DIGITAL✔✔
AS9136WOBCOM GmbH✔✔
AS60068Datacamp Limited (CDN77 / DataPacket)✔✔
AS49544i3D.net B.V✔✔
AS216265ARISTO NETWORKS LTD✔✘
AS6424EDGOO NETWORKS✔✔
AS200249Products Up GmbH✔✔
AS24482SG.GS✔✔
AS1764Next Layer Telecommunications✔✔
AS50698TETA s.r.o.✔✔
AS32590Valve Corporation✔✔
AS40994Alwyzon (Hohl IT)✔✔
AS57304RETN Russia✔✔
AS88811&1 Versatel GmbH✔✔
AS4455IX Reach Ltd✔✘
AS57344Telehouse EAD✔✘
AS8801Rocket Fibre Ltd✔✔
AS21430WIA spol. s.r.o.✔✘
AS2852CESNET z.s.p.o.✔✘
AS199524Gcore S.A.✔✔
AS42473Anexia Cloud Solutions GmbH✔✔
AS35297Dataline LLC✔✔
AS8767M-net Telekommunikations GmbH✔✔
AS44066firstcolo GmbH✔✔
AS215120Evolus IT Solutions GmbH✔✔
AS56382vServer.site LTD✔✔
AS34779T-2, d.o.o.✔✔
AS22356Durand do Brasil Ltda✔✔
AS1820WNET TELECOM USA Corp.✔✔
AS36236NetActuate, Inc✔✔
AS3212Telemach Slovenija d.o.o.✔✘
AS21013eww ag✔✘
AS6663Türk Telekom International✔✘
AS16097HL komm Telekommunikations GmbH✔✘
AS21320GEANT Vereniging✔✘
AS9009M247 Europe SRL✔✘
AS30058FDCservers.net✔✘
AS16019Vodafone Czech Republic a.s.✔✘
AS61599EAI TELECOMUNICACOES LTDA✔✘
AS47927WIFIWEB s.r.l.✘✔
AS53062ALT | GRUPO BRASIL TECPAR✔✘
AS197451Brno University of Technology✘✔
AS37721Virtual Technologies & Solutions✘✔

DownstreamsThis information was fetched live at page load time

 ASNDescriptionIPv4IPv6
AS207167mapnet IT services s.r.o.✔✔
AS204957GREEN FLOID LLC✔✔
AS51134Development 777 s.r.o.✔✔
AS211085mapnet IT services s.r.o.✔✔
AS48921Yoursafe Holding B.V.✔✔
AS64481Joint Venture Dragon Capital LLC✔✘
AS21045K-net Technical International Group, s.r.o.✔✘
aut-num:AS24971as-name:        MASTER-ASorg:ORG-MIs2-RIPEremarks:        .  .              _  _remarks:        |\/| _. __|_ _ ._| \/remarks:        |  |(_|_> |_(/_| |_/\_remarks:descr:          Czech Republic / www.master.czdescr:          e-mail: noc@master.czremarks:remarks:        ========================  Upstream  ========================remarks:remarks:        = Arelion FKA Teliaremarks:import:         fromAS1299 action pref=90; accept ANY AND NOT {0.0.0.0/0};export:         toAS1299  announceAS24971:AS-MASTERCZremarks:remarks:        = RETNremarks:import:         fromAS9002 action pref=90; accept ANY AND NOT {0.0.0.0/0};export:         toAS9002  announceAS24971:AS-MASTERCZremarks:remarks:        ========================  Downstream ========================remarks:remarks:        = Q-Net CZimport:         fromAS21045 action pref=10; acceptAS21045export:         toAS21045 announce ANYremarks:        = netsafeimport:         fromAS48921 action pref=10; acceptAS48921AS-FDRexport:         toAS48921 announce ANYremarks:        = INTACTO GAMES a.s.import:         fromAS51134 action pref=10; acceptAS51134export:         toAS51134 announce ANYremarks:        = DCIT, a.s.import:         fromAS199806  action pref=10; acceptAS199806export:         toAS199806 announce ANYremarks:        = amccomp s.r.o.import:         fromAS207167 action pref=10; acceptAS207167AS201922AS208143AS215777AS206321AS207583AS207575AS207576export:         toAS207167 announce {0.0.0.0/0};remarks:        = LAYER6import:         fromAS204957 action pref=10; acceptAS204957;export:         toAS204957 announce {0.0.0.0/0};remarks:        = Dragon-Capitalimport:         fromAS64481 action pref=10; acceptAS64481;export:         toAS64481 announce {0.0.0.0/0};remarks:remarks:        ========================  peering.cz peering ========================remarks:import:         fromAS24971:AS-MAI-PEERING-CZ-PEER action pref = 50; acceptas-peeringcz-rsexport:         toAS24971:AS-MAI-PEERING-CZ-PEER announceAS24971:AS-MASTERCZ-CZPEERINGremarks:remarks:        ========================  NIX Prague peering ========================remarks:import:         fromAS24971:AS-MAI-NIX-PEER action pref = 50; acceptAS47200:AS-NIXCZ-RSCLIENTSexport:         toAS24971:AS-MAI-NIX-PEER announceAS24971:AS-MASTERCZ-CZNIXremarks:remarks:        ========================  NIX Bratislava peering ========================remarks:import:         fromAS24971:AS-MAI-NIX-PEER action pref = 50; acceptAS47627:AS-NIXSK-RSCLIENTSexport:         toAS24971:AS-MAI-NIX-PEER announceAS24971:AS-MASTERCZ-SKNIXremarks:admin-c:        DUMY-RIPEtech-c:         DUMY-RIPEstatus:         ASSIGNEDmnt-by:         RIPE-NCC-END-MNTmnt-by:         MASTER-MNTcreated:        2002-06-11T14:14:49Zlast-modified:  2025-10-26T06:21:55Zsource:         RIPEremarks:        ****************************remarks:        * THIS OBJECT IS MODIFIEDremarks:        * Please note that all data that is generally regarded as personalremarks:        * data has been removed from this object.remarks:        * To view the original object, please query the RIPE Database at:remarks:        * http://www.ripe.net/whoisremarks:        ****************************organisation:ORG-MIs2-RIPEorg-name:       MasterDC s.r.o.country:        CZorg-type:       LIRaddress:        Dummy address forORG-MIs2-RIPE# Email removed, Log into bgp.tools to see whois emailsmnt-ref:        MASTER-MNTmnt-ref:        RIPE-NCC-HM-MNTmnt-by:         RIPE-NCC-HM-MNTmnt-by:         MASTER-MNTabuse-c:        MAIc-RIPEcreated:        2004-04-17T11:04:37Zlast-modified:  2025-04-29T09:47:49Zsource:         RIPEremarks:        ****************************remarks:        * THIS OBJECT IS MODIFIEDremarks:        * Please note that all data that is generally regarded as personalremarks:        * data has been removed from this object.remarks:        * To view the original object, please query the RIPE Database at:remarks:        * http://www.ripe.net/whoisremarks:        ****************************
Last Update: 2025-11-25T03:25:00Z UTC

Member of the following AS-SETs

-MemberASN Count
RIPEas8251:as-nix-peerings65
RIPEas42000:as-nixcz-peerings80
RIPEas-43413_nt-nix69
RIPEas5578:as-sixpeers51
LEVEL3as-level3-customers-eu0
RIPEas-emaxsixpeers39
RIPEas-sixstip-set47
RIPEas-to2-nix-peer63
RIPEas-retn-actual-v4

12454

RADBas174:as-cogc-03345
RIPEas-retn-actual-v63805
RIPEas24971:as-mai-peering-cz-peer10
ALTDBas51202:as-all5103
RIPEas-sixsk-members57
RIPEas-energotel_six_peers52
RIPEas-transcz799
RIPEas24971:as-mastercz22

Go to PeeringDB page

PeeringDB AS-SET:
AS24971:AS-MASTERCZ
Suggested Prefix Limits

IPv4: 100

IPv6: 70

Internet Exchange Points

 NameIPv4IPv6Link Speed
NIX.CZ91.210.16.862001:7f8:14::11:2200 gbps
Peering.cz185.0.20.142001:7f8:7f::14100 gbps
NIX.CZ FENIX194.50.100.862001:7f8:14:5ec::11:2100 gbps
NIX.CZ FENIX194.50.100.852001:7f8:14:5ec::11:1100 gbps
BR-IX185.1.25.112001:7f8:87::1110 gbps
NIX.SK194.30.187.852001:7f8:91::8:110 gbps
NIX.CZ91.210.16.852001:7f8:14::11:1n/a
Last Update: 2025-11-27T10:08:20Z UTC
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