AS174 Cogent Communications, LLC 🇺🇸 US
Announcing 4,362 prefixes, seen at the RIS collectors.
IPv4 prefixes
3,832
37,672,960 (147,160 × /24)
IPv6 prefixes
530
58 × /32
Upstreams
92
transit providers observed
Peers
22
settlement-free adjacencies
Downstreams
6,446
transit customers observed
Customer cone
67,201
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
3,832 in total
| Prefix | RPKI | Peers | Sample path | First seen |
|---|---|---|---|---|
| 154.13.122.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 154.13.123.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 154.13.124.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 154.13.125.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 154.13.126.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 154.13.127.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 154.13.130.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 154.13.132.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.13.134.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.13.146.0/23 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 154.13.160.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.13.161.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 154.13.200.0/22 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.13.204.0/23 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 154.13.206.0/23 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 154.13.212.0/22 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 154.13.252.0/23 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 154.13.254.0/23 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 154.17.0.0/16 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.17.94.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.17.248.0/23 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.17.250.0/23 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.17.252.0/24 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.17.255.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 154.18.0.0/15 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.18.152.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 154.18.153.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.18.154.0/23 v4 | no ROA | 41 | 34549174 | 2026-11-11 |
| 154.18.156.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 154.18.157.0/24 v4 | no ROA | 18 | 34549174 | 2026-09-18 |
| 154.18.158.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 154.18.159.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 154.18.160.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.18.171.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.18.178.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 154.18.179.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 154.18.198.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.18.209.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 154.18.226.0/24 v4 | RPKI valid | 41 | 34549174 | 2026-09-18 |
| 154.18.254.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.19.44.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.19.44.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.19.45.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.19.47.0/24 v4 | no ROA | 25 | 34549174 | 2026-09-18 |
| 154.21.0.0/16 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.21.8.0/23 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.21.10.0/23 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.21.14.0/24 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.21.20.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.21.24.0/23 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.21.26.0/23 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.21.31.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 154.21.36.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.21.38.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.21.41.0/24 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.21.60.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.21.62.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.21.64.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.21.66.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-22 |
| 154.21.68.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 154.21.69.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 154.21.70.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.21.96.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.21.98.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 154.21.106.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.21.110.0/23 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.21.118.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 154.21.124.0/23 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.21.126.0/23 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.21.132.0/22 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.21.154.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.21.157.0/24 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.21.158.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.21.168.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.21.172.0/22 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.21.192.0/21 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.21.204.0/22 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.21.210.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.21.214.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.21.216.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-22 |
| 154.21.218.0/23 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 154.21.232.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.21.236.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.21.238.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.22.0.0/15 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.22.4.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.22.6.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.22.19.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.22.128.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.22.132.0/23 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.22.134.0/23 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.22.136.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.22.139.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.24.0.0/13 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.28.2.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.28.6.0/23 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 154.28.130.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.28.136.0/23 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.28.138.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.28.149.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 154.28.151.0/24 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.28.152.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.28.154.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.29.136.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.29.138.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.29.142.0/23 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.29.152.0/21 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.29.175.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.30.0.0/24 v4 | no ROA | 34 | 34549174 | 2026-09-18 |
| 154.30.34.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.30.36.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.30.38.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.30.128.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.30.130.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.30.140.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.30.144.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.30.154.0/24 v4 | no ROA | 19 | 34549174 | 2026-09-18 |
| 154.30.186.0/23 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.36.0.0/14 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.36.128.0/19 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.37.156.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.37.158.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.37.172.0/23 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.37.174.0/23 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.37.176.0/23 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.37.178.0/23 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.37.180.0/23 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.37.182.0/23 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.37.192.0/23 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.37.194.0/23 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 154.37.198.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.37.208.0/20 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.38.21.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.38.26.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.38.32.0/23 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.38.34.0/23 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 154.38.36.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.38.38.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.38.130.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.38.140.0/24 v4 | no ROA | 40 | 34549174 | 2026-10-31 |
| 154.38.141.0/24 v4 | no ROA | 40 | 34549174 | 2026-10-31 |
| 154.38.142.0/24 v4 | no ROA | 40 | 34549174 | 2026-10-31 |
| 154.38.143.0/24 v4 | no ROA | 40 | 34549174 | 2026-10-31 |
| 154.39.1.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.39.3.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.40.0.0/13 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 154.40.138.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.41.65.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.41.70.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.41.79.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.41.80.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.41.81.0/24 v4 | RPKI valid | 41 | 34549174 | 2026-11-04 |
| 154.41.83.0/24 v4 | RPKI invalid | 10 | 58057174 | 2026-10-30 |
| 154.41.84.0/24 v4 | RPKI invalid | 10 | 58057174 | 2026-10-30 |
| 154.41.86.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-22 |
| 154.41.88.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-31 |
| 154.41.89.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-31 |
| 154.41.90.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-31 |
| 154.41.133.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.41.138.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.41.139.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.41.240.0/23 v4 | no ROA | 13 | 37721174 | 2026-10-31 |
| 154.41.242.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-31 |
| 154.41.243.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-31 |
| 154.42.4.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.43.37.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.43.39.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.43.49.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.43.50.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.43.57.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.43.61.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.43.66.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.43.67.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.43.68.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.43.130.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.43.160.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.43.161.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.43.162.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.43.167.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.44.0.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.44.4.0/24 v4 | no ROA | 7 | 37721174 | 2026-09-18 |
| 154.44.5.0/24 v4 | no ROA | 8 | 37721174 | 2026-09-18 |
| 154.44.6.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.44.9.0/24 v4 | no ROA | 7 | 37721174 | 2026-09-18 |
| 154.44.12.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.44.16.0/21 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.44.130.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.44.180.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.44.185.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.45.43.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.45.45.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.45.81.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.45.82.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.45.214.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.45.236.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.46.128.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.46.130.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.47.5.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.47.6.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.47.152.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |