COGENT INTERNATIONAL LIMITED

Cogent Communications, LLC
Data as of 2026-08-23
GLEIF verified
Complete entity footprint
2 linked clusters · 5,136 netblocks · 137,560,880 IPv4 addresses · 631 IPv6 prefixes
This organisation's clusters combined by evidence — shared operating domain cogentco.com — not name similarity, so genuinely different organisations that share a name are excluded.
View the full entity page →
LEI
213800B61KHO7ZN59E64
Registered name
COGENT INTERNATIONAL LIMITED
Jurisdiction
GB
Ultimate parent
No parent on file in GLEIF
Cluster stats
Netblocks5,006 · 38,212,656 IPv4 addresses
IPv6 619 prefixes (largest 2600::/28)
Registered in United States (2,877) · South Africa (31) · United Kingdom (22) · Netherlands (8) · France (8) · Ukraine (8)
All fragments 5,179 blocks across 22 clusters
Cluster ID226908615
RegistryAPNIC
Owner jurisdictionGB
Customersfind customers using this network →
Evidence & provenance ?
Attribution GLEIF legal-entity match
Legal identityLEI 213800B61KHO7ZN59E64
Shared handles clustered on 100 shared RIR contact/maintainer handles
Registry names 13 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

Footprint over time

9 weekly snapshots · JSON
5,148 +372 netblocks since 2026-07-05
2026-07-05 peak 5,148 2026-08-23

IP Ranges (5,006)

showing 50 of 5,006 — see all — ⬇ export CSV (free export limited to 500 rows — subscribe for the full export)
CIDR Org name Registry Status Confidence
38.143.4.0/24 Cogent Communications, LLC BGP ANNOUNCED ● high
38.183.120.0/22 Cogent Communications, LLC BGP ANNOUNCED ● high
38.183.120.0/24 Cogent Communications, LLC BGP ANNOUNCED ● high
38.183.121.0/24 Cogent Communications, LLC BGP ANNOUNCED ● high
38.183.122.0/24 Cogent Communications, LLC BGP ANNOUNCED ● high
38.183.123.0/24 Cogent Communications, LLC BGP ANNOUNCED ● high
117.239.144.96/28 cogent APNIC ASSIGNED NON-PORTABLE ● high
144.56.20.0/24 Cogent-Communications-LLC RIPE LEGACY ● high
144.56.23.0/24 Cogent-Communications-LLC RIPE LEGACY ● high
144.56.33.0/24 Cogent-Communications-LLC RIPE LEGACY ● high
144.56.40.0/24 Cogent-Communications-LLC RIPE LEGACY ● high
144.56.90.0/24 Cogent-Communications-LLC RIPE LEGACY ● high
144.56.110.0/24 Cogent-Communications-LLC RIPE LEGACY ● high
155.178.69.0/24 Cogent Communications, LLC BGP ANNOUNCED ● high
155.178.70.0/24 Cogent Communications, LLC BGP ANNOUNCED ● high
169.40.97.0/24 Cogent-Communications-LLC RIPE LEGACY ● high
169.40.99.0/24 Cogent-Communications-LLC RIPE LEGACY ● high
169.40.108.0/24 Cogent-Communications-LLC RIPE LEGACY ● high
169.40.113.0/24 Cogent-Communications-LLC RIPE LEGACY ● high
169.40.118.0/24 Cogent-Communications-LLC RIPE LEGACY ● high
169.40.126.0/24 Cogent-Communications-LLC RIPE LEGACY ● high
192.33.4.0/24 Cogent Communications, LLC BGP ANNOUNCED ● high
198.176.213.0/24 Cogent Communications, LLC BGP ANNOUNCED ● high
198.176.214.0/24 Cogent Communications, LLC BGP ANNOUNCED ● high
204.6.192.0/18 Cogent Communications, LLC BGP ANNOUNCED ● high
208.7.91.0/24 Cogent Communications, LLC BGP ANNOUNCED ● high
208.11.210.0/24 Cogent Communications, LLC BGP ANNOUNCED ● high
216.151.168.0/24 Cogent Communications ARIN ASSIGNMENT ● high
2001:500:2::/48 Cogent Communications, LLC BGP ANNOUNCED ● high
38.19.224.0/23 Cogent Communications, LLC BGP ANNOUNCED ● medium
38.19.236.0/24 Cogent Communications, LLC BGP ANNOUNCED ● medium
38.83.202.0/24 Cogent Communications, LLC BGP ANNOUNCED ● medium
38.99.95.0/24 Cogent Communications, LLC BGP ANNOUNCED ● medium
38.110.128.0/24 Cogent Communications, LLC BGP ANNOUNCED ● medium
38.111.176.0/22 Cogent Communications, LLC BGP ANNOUNCED ● medium
38.111.184.0/21 Cogent Communications, LLC BGP ANNOUNCED ● medium
38.156.72.0/24 Cogent Communications, LLC BGP ANNOUNCED ● medium
38.156.73.0/24 Cogent Communications, LLC BGP ANNOUNCED ● medium
38.156.74.0/24 Cogent Communications, LLC BGP ANNOUNCED ● medium
38.188.160.0/24 Cogent Communications, LLC BGP ANNOUNCED ● medium
38.188.161.0/24 Cogent Communications, LLC BGP ANNOUNCED ● medium
38.188.165.0/24 Cogent Communications, LLC BGP ANNOUNCED ● medium
38.190.150.0/24 Cogent Communications, LLC BGP ANNOUNCED ● medium
38.191.122.0/23 Cogent Communications, LLC BGP ANNOUNCED ● medium
38.191.122.0/24 Cogent Communications, LLC BGP ANNOUNCED ● medium
38.191.123.0/24 Cogent Communications, LLC BGP ANNOUNCED ● medium
38.211.28.0/22 Cogent Communications, LLC BGP ANNOUNCED ● medium
80.91.81.0/24 Cogent Communications, LLC BGP ANNOUNCED ● medium
154.51.14.0/24 Cogent Communications, LLC BGP ANNOUNCED ● medium
154.59.201.0/24 Cogent Communications, LLC BGP ANNOUNCED ● medium

IPv6 ranges (619)

showing the 15 largest allocations
CIDR
2600::/28
2600::/29
2a06:f980::/29
2a0e:78c0::/29
2001:440::/32
2001:550::/32
2001:978::/32
2402:4480::/32
2403:a800::/32
2605:6900::/32
2605:a680::/32
2804:5330::/32
2a02:bf8::/32
2a0c:9e06::/32
2a0e:a944::/32

Domains hosted in this network

what's this?
ntp.org acuityplatform.com n-able.com nvts.co dstv.com fortinet.com 52kele.cn fortinet.net tlsfgw.cn hjenglish.com sonicwall.com mysonicwall.com threatlocker.com cotanet.com.br root-servers.net 603ln9u49zcl73wgbkyh.info rookie7exhibitau.net i4includeriskd.org cdnlah.net cementpigeon5ord.net

Network trust

what's this?
RPKI hygiene: F how networks compare →
6.3% of checked blocks have valid RPKI ROA coverage (127 of 2,000, sampled from 5,148)
Wholesale/transit re-announcements (23)

These blocks are registered to Cogent Communications, LLC but cryptographically authorized across 14 different networks — typical for a large wholesale or transit carrier whose address space is substantially re-announced by downstream customers under their own ASNs, not individually noteworthy.

23.227.92.0/22 /22 authorized for AS7018 — AT&T Enterprises, LLC
52.128.220.0/22 /22 authorized for AS7018 — AT&T Enterprises, LLC
82.110.120.0/22 /22 authorized for AS6079 — RCN
23.234.144.0/22 /22 authorized for AS7018 — AT&T Enterprises, LLC
107.166.24.0/22 /22 authorized for AS7018 — AT&T Enterprises, LLC
107.166.100.0/22 /22 authorized for AS7018 — AT&T Enterprises, LLC
38.183.120.0/22 /22 authorized for AS271752 — AS271752
38.57.34.0/23 /23 authorized for AS154488 — IoT Innovation Technologies Company Limited
86.109.76.0/23 /23 authorized for AS834 — IPXO LLC
38.19.224.0/23 /23 authorized for AS272265 — AS272265
154.194.46.0/23 /23 authorized for AS17561 — Larus Limited
38.57.34.0/24 /24 authorized for AS154488 — IoT Innovation Technologies Company Limited
38.57.35.0/24 /24 authorized for AS154488 — IoT Innovation Technologies Company Limited
38.67.22.0/24 /24 authorized for AS213971 — FAL GROUP SAS
38.111.8.0/24 /24 authorized for AS397924 — Delta Dental of Rhode Island
+8 more — see the REST API

NIC Handles

A2-MNT AB1061-AP AC1578-AP APNIC-HM AR834 AS13536 AS13795 AS149718 AS150555 AS152179 AS152324 AS152491 +88 more