AS174 — COGENT-174

Network type: transit

AS174 announces 8,752 IPv4 prefixes covering 24,665,471 addresses and 523 IPv6 prefixes.

About this network

Cogent is a large, low-cost Tier 1 IP transit provider with an extensive international backbone, popular with data centers and hosting providers.

What it's used for

• Wholesale IP transit and dedicated internet access, often priced aggressively per megabit.
• Backbone connectivity into thousands of carrier-neutral data centers where Cogent has a presence.

Notable

• Cogent has a long history of peering disputes (notably with other Tier 1s and large content networks), which have periodically caused partial reachability problems between Cogent-only and rival-only customers.
• A very low AS number (174) reflects its roots in early internet registration.

Interesting

• Cogent grew largely by acquiring the assets of failed dot-com-era carriers, assembling a global network at bargain prices.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 2.58.4.0/22
• 5.83.219.0/24
• 5.157.72.0/21
• 8.24.64.0/23
• 8.24.72.0/23
• 16.5.118.0/23
• 16.5.168.0/22
• 16.5.198.0/24
• 23.26.130.0/24
• 23.135.116.0/24
• 23.135.124.0/24
• 23.141.196.0/24
• 23.141.212.0/24
• 23.142.100.0/24
• 23.146.76.0/24
• 23.146.116.0/24
• 23.148.44.0/24
• 23.148.60.0/24
• 23.148.68.0/24
• 23.148.92.0/24
• 23.148.116.0/24
• 23.148.124.0/24
• 23.148.164.0/24
• 23.151.196.0/24
• 23.161.96.0/24
• 23.167.168.0/24
• 23.227.92.0/22
• 23.234.144.0/22
• 23.237.93.0/24
• 37.34.88.0/21
• 37.49.150.0/24
• 38.0.0.0/15
• 38.2.128.0/21
• 38.2.143.0/24
• 38.2.229.0/24
• 38.3.0.0/20
• 38.3.32.0/19
• 38.3.128.0/23
• 38.3.144.0/22
• 38.3.161.0/24
• 38.3.171.0/24
• 38.3.180.0/22
• 38.3.187.0/24
• 38.3.191.0/24
• 38.3.202.0/23
• 38.3.204.0/22
• 38.3.223.0/24
• 38.4.3.0/24
• 38.4.4.0/22
• 38.4.8.0/21
• 38.4.32.0/24
• 38.4.34.0/23
• 38.4.36.0/22
• 38.4.40.0/21
• 38.4.50.0/23
• 38.4.52.0/22
• 38.4.96.0/20
• 38.4.120.0/21
• 38.4.144.0/20
• 38.4.160.0/19
• 38.4.192.0/18
• 38.5.0.0/16
• 38.7.64.0/20
• 38.7.96.0/23
• 38.7.99.0/24
• 38.7.108.0/23
• 38.7.119.0/24
• 38.7.121.0/24
• 38.7.122.0/23
• 38.7.124.0/22
• 38.7.129.0/24
• 38.7.130.0/23
• 38.7.160.0/19
• 38.7.224.0/19
• 38.8.0.0/16
• 38.9.33.0/24
• 38.9.41.0/24
• 38.9.42.0/23
• 38.9.51.0/24
• 38.9.52.0/24
• 38.9.54.0/23
• 38.9.121.0/24
• 38.9.177.0/24
• 38.9.214.0/23
• 38.10.0.0/24
• 38.10.2.0/23
• 38.10.4.0/22
• 38.10.8.0/21
• 38.10.16.0/21
• 38.10.25.0/24
• 38.10.26.0/23
• 38.10.28.0/22
• 38.10.90.0/23
• 38.10.93.0/24
• 38.10.94.0/24
• 38.10.100.0/23
• 38.10.117.0/24
• 38.10.120.0/21
• 38.10.150.0/24
• 38.10.156.0/22

and 9,175 more.

Upstream networks

• AS1299 Arelion Sweden AB
• AS3356 Level 3 Parent, LLC
• AS34549 meerfarbig GmbH & Co. KG
• AS22652 Videotron Ltee
• AS2914 NTT America, Inc.
• AS7018 AT&T Enterprises, LLC
• AS50300 CustodianDC Limited
• AS39392 SH.cz s.r.o.
• AS577 Bell Canada
• AS37721 Virtual-Technologies-Solutions-SA
• AS1257 TELE2
• AS6461 Zayo Bandwidth
• AS20205 Amplex Electric, Inc.
• AS3257 GTT Communications Inc.
• AS50673 Serverius Holding B.V.
• AS34927 iFog GmbH
• AS58057 Securebit AG
• AS17639 Converge ICT Solutions Inc.
• AS198978 Alkante SAS
• AS6453 TATA COMMUNICATIONS AMERICA INC
• AS3130 RGnet OU
• AS327727 C-SQUARED
• AS6762 TELECOM ITALIA SPARKLE S.p.A.
• AS394256 Tech Futures Interactive Inc.
• AS2497 Internet Initiative Japan Inc.

Downstream networks

• AS16509 Amazon.com, Inc.
• AS8151 UNINET
• AS7545 TPG Telecom Limited
• AS7552 Viettel Group
• AS36352 HostPapa
• AS11172 S. de R.L. de C.V.
• AS9009 M247 Europe SRL
• AS13999 Cable, S.A. de C.V.
• AS11776 Breezeline
• AS5650 Frontier Communications of America, Inc.
• AS7713 PT Telekomunikasi Indonesia
• AS20940 Akamai International B.V.
• AS812 Rogers Communications Canada Inc.
• AS8452 TE-AS
• AS36914 KENET-AS
• AS7979 Servers.com, Inc.
• AS9829 National Internet Backbone
• AS13335 Cloudflare, Inc.
• AS18779 EGIHosting
• AS12389 PJSC Rostelecom
• AS13977 Fidium
• AS13693 Vexus Fiber
• AS6327 Shaw Communications
• AS6503 S.A.B. de C.V.
• AS62904 Eonix Corporation

Adjacent networks

• AS327727 C-SQUARED
• AS3356 Level 3 Parent, LLC
• AS1299 Arelion Sweden AB
• AS58057 Securebit AG
• AS50673 Serverius Holding B.V.
• AS198978 Alkante SAS
• AS22652 Videotron Ltee
• AS3130 RGnet OU
• AS971 PureVoltage Hosting Inc.
• AS7018 AT&T Enterprises, LLC
• AS132825 MYTEK TRADING PTY LTD
• AS3741 IS
• AS6762 TELECOM ITALIA SPARKLE S.p.A.
• AS34549 meerfarbig GmbH & Co. KG
• AS39392 SH.cz s.r.o.
• AS16509 Amazon.com, Inc.
• AS3257 GTT Communications Inc.
• AS2914 NTT America, Inc.
• AS8151 UNINET
• AS7545 TPG Telecom Limited
• AS6453 TATA COMMUNICATIONS AMERICA INC
• AS12389 PJSC Rostelecom
• AS4134 No.31,Jin-rong Street
• AS50300 CustodianDC Limited
• AS2497 Internet Initiative Japan Inc.

Routing security

• RPKI: 449 valid, 18 invalid and 4,005 not-found announcements; 1,579 ROAs.
• ASPA: 1 authorised providers.
• IRR: 12% of announcements registered; 2,240 route objects.
• Listed in as-sets: AS-10099, AS-11700-PEERS, AS-131219, AS-135300, AS-14230-UPSTREAM, AS-1623-FARNAM, AS-17117IMPORT, AS-18187, AS-19766, AS-1TELECOM-CUSTOMERS01, AS-21574-CUSTOMERS, AS-28110, AS-33932-PROVIDERS, AS-37148-GLOBACOM, AS-398194:AS-ALL, AS-3PSYSTEM-UPSTREAMS, AS-43323_LND-THN-PEERS, AS-4648-PAIX-PEER, AS-46935, AS-494E4341, AS-53062-CUSTOMERS, AS-53062-CUSTOMERS, AS-53427-TGLOBAL, AS-64463-PEERS, AS-6561-AS-PEERS.

Internet exchanges

• Milan Internet Exchange — Milan, Italy
• CERN IXP / Equinix Internet Exchange Geneva — Geneva, Switzerland