AS174 Cogent Communications, LLC 🇺🇸 US
Announcing 4,364 prefixes, seen at the RIS collectors.
IPv4 prefixes
3,833
37,673,216 (147,161 × /24)
IPv6 prefixes
531
58 × /32
Upstreams
89
transit providers observed
Peers
23
settlement-free adjacencies
Downstreams
6,445
transit customers observed
Customer cone
67,198
ASes reachable through it
Registry and operator data
- AS number
- AS174
- Name
- Cogent Communications, LLC
- Organisation
- Cogent Communications, Inc.
- Country
- 🇺🇸 US
- RIR
- ARIN
- Allocated
- 1996-05-16
- Network type
- NSP
- Traffic levels
- 100+Tbps
- Scope
- Global
- Peering policy
- No
- Website
- http://www.cogentco.com/
- Looking glass
- http://www.cogentco.com/en/network/looking-glass
- PeeringDB
- net/267
- Facilities
- 816
RPKI coverage of this AS
Its own announcements, validated against the current ROA set
Announced prefixes
3,833 in total
| Prefix | RPKI | Peers | Sample path | First seen |
|---|---|---|---|---|
| 206.3.64.0/18 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.3.128.0/17 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.3.139.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 206.4.0.0/14 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.42.0.0/16 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.42.108.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.61.0.0/16 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.62.97.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.84.0.0/15 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.85.2.0/23 v4 | no ROA | 36 | 34549174 | 2026-09-18 |
| 206.85.2.0/24 v4 | no ROA | 36 | 34549174 | 2026-09-18 |
| 206.85.3.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.85.168.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.85.169.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.85.170.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.85.171.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.85.172.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.85.173.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.85.174.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.85.175.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.104.0.0/14 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.104.31.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.104.56.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.104.62.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.105.176.0/20 v4 | no ROA | 31 | 37721174 | 2026-09-18 |
| 206.105.176.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.105.177.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.105.178.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.105.179.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.105.180.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.105.181.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.105.182.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.105.183.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.105.184.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.105.185.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.105.186.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.105.187.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.105.188.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.105.189.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.105.190.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.105.191.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.107.70.0/24 v4 | no ROA | 35 | 34549174 | 2026-09-18 |
| 206.107.71.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.119.0.0/16 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.130.241.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 206.144.128.0/20 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.148.0.0/15 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.148.19.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 206.148.40.0/22 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 206.158.0.0/15 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.159.100.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 206.160.0.0/16 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.183.224.0/19 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.185.0.0/16 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.190.0.0/19 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.197.34.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.197.50.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.208.184.0/21 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.225.10.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.228.0.0/14 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.229.154.0/23 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.232.0.0/14 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.232.27.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 206.232.28.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 206.232.108.0/22 v4 | no ROA | 1 | 2162858280174 | 2026-11-10 |
| 206.236.0.0/15 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.249.0.0/16 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 206.250.0.0/16 v4 | RPKI valid | 40 | 34549174 | 2026-09-18 |
| 207.12.0.0/14 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 207.13.72.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 207.15.6.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 207.31.64.0/18 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 207.40.0.0/14 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 207.40.111.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 207.42.54.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 207.90.244.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 207.91.97.0/24 v4 | RPKI valid | 40 | 34549174 | 2026-09-18 |
| 207.137.78.0/23 v4 | RPKI valid | 40 | 34549174 | 2026-09-18 |
| 207.142.0.0/16 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 207.152.0.0/18 v4 | RPKI valid | 42 | 34549174 | 2026-09-18 |
| 207.153.64.0/18 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 207.153.122.0/24 v4 | no ROA | 39 | 34549174 | 2026-10-24 |
| 207.204.229.0/24 v4 | RPKI valid | 40 | 34549174 | 2026-09-18 |
| 207.230.0.0/19 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 207.230.1.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 207.234.0.0/17 v4 | RPKI valid | 42 | 34549174 | 2026-09-18 |
| 207.254.144.0/20 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.0.0.0/11 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.0.20.0/23 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.0.32.0/20 v4 | no ROA | 31 | 37721174 | 2026-09-18 |
| 208.0.74.0/23 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.0.80.0/20 v4 | no ROA | 31 | 37721174 | 2026-09-18 |
| 208.0.118.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.0.122.0/23 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.0.130.0/23 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.0.134.0/23 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.0.249.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.1.96.0/23 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.1.247.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.2.67.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.4.14.0/24 v4 | no ROA | 35 | 34549174 | 2026-09-18 |
| 208.4.80.0/21 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.4.80.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.4.81.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.4.82.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.4.83.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.4.84.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.4.85.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.4.86.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.4.87.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.4.159.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.7.140.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.8.164.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.8.178.0/23 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.8.188.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.8.250.0/23 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.10.40.0/23 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.15.226.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.16.209.0/24 v4 | no ROA | 41 | 34549174 | 2026-10-29 |
| 208.16.211.0/24 v4 | no ROA | 41 | 34549174 | 2026-10-30 |
| 208.16.215.0/24 v4 | no ROA | 41 | 34549174 | 2026-10-30 |
| 208.17.225.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.28.70.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.29.138.0/23 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.29.144.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.29.201.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.30.14.0/23 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 208.30.14.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 208.30.15.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 208.32.0.0/14 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.32.11.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.32.122.0/23 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.33.24.0/23 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 208.33.24.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 208.33.25.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 208.34.201.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.35.13.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.35.92.0/22 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.64.220.0/22 v4 | RPKI valid | 40 | 34549174 | 2026-09-18 |
| 208.67.16.0/21 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.71.88.0/22 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 208.77.0.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.77.2.0/23 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.79.12.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.80.220.0/22 v4 | no ROA | 2 | 21628582806762174 | 2026-11-10 |
| 208.81.128.0/21 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 208.87.19.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 209.10.119.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 209.14.0.0/16 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 209.14.85.0/24 v4 | no ROA | 36 | 34549174 | 2026-11-10 |
| 209.14.88.0/24 v4 | no ROA | 36 | 34549174 | 2026-11-10 |
| 209.14.253.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 209.17.96.0/20 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 209.39.20.0/24 v4 | RPKI valid | 40 | 34549174 | 2026-09-18 |
| 209.39.26.0/24 v4 | RPKI valid | 40 | 34549174 | 2026-09-18 |
| 209.41.192.0/18 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 209.44.64.0/19 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 209.51.94.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 209.61.0.0/17 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 209.70.240.0/24 v4 | RPKI valid | 40 | 34549174 | 2026-09-18 |
| 209.105.132.0/23 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 209.107.195.0/24 v4 | RPKI valid | 40 | 34549174 | 2026-09-18 |
| 209.115.0.0/17 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 209.127.202.0/24 v4 | RPKI valid | 41 | 34549174 | 2026-09-18 |
| 209.146.0.0/17 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 209.146.36.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 209.146.37.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-30 |
| 209.146.42.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 209.146.44.0/22 v4 | no ROA | 10 | 58057174 | 2026-11-05 |
| 209.146.44.0/24 v4 | no ROA | 10 | 58057174 | 2026-11-05 |
| 209.146.45.0/24 v4 | no ROA | 41 | 34549174 | 2026-11-05 |
| 209.146.46.0/24 v4 | no ROA | 41 | 34549174 | 2026-11-05 |
| 209.146.47.0/24 v4 | no ROA | 41 | 34549174 | 2026-11-05 |
| 209.146.100.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 209.146.107.0/24 v4 | no ROA | 41 | 34549174 | 2026-11-05 |
| 209.146.122.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 209.206.126.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 209.227.78.0/24 v4 | RPKI valid | 40 | 34549174 | 2026-09-18 |
| 209.227.79.0/24 v4 | RPKI valid | 40 | 34549174 | 2026-09-18 |
| 212.20.128.0/19 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 212.20.151.0/24 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 212.134.168.0/23 v4 | RPKI valid | 42 | 34549174 | 2026-09-18 |
| 212.189.24.0/22 v4 | RPKI invalid | 15 | 58057174 | 2026-10-19 |
| 212.189.32.0/22 v4 | RPKI valid | 40 | 34549174 | 2026-10-18 |
| 213.146.160.0/19 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 213.146.188.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 213.178.143.0/24 v4 | RPKI valid | 40 | 34549174 | 2026-09-18 |
| 213.206.128.0/19 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 216.28.0.0/15 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 216.28.9.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 216.29.55.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 216.29.200.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 216.55.80.0/20 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 216.74.111.0/24 v4 | RPKI invalid | 2 | 21628582806762174 | 2026-11-10 |
| 216.131.104.0/24 v4 | RPKI valid | 40 | 34549174 | 2026-09-18 |
| 216.131.106.0/23 v4 | RPKI valid | 40 | 34549174 | 2026-09-18 |
| 216.137.128.0/20 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 216.152.20.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 216.152.21.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 216.152.22.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |