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 |
|---|---|---|---|---|
| 154.47.154.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.47.159.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.48.0.0/12 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 154.48.200.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.48.202.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.48.209.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.48.214.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.48.216.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.48.221.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.48.238.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.48.246.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.48.247.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.48.248.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.49.68.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.49.70.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.49.72.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.49.73.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.49.74.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.49.75.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.49.97.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.49.114.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.49.115.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.49.128.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.49.129.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.49.130.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.49.131.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.49.132.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.49.133.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.49.134.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.49.135.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.49.140.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-13 |
| 154.49.160.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-29 |
| 154.49.172.0/24 v4 | RPKI invalid | 5 | 22652174 | 2026-10-31 |
| 154.49.173.0/24 v4 | RPKI invalid | 5 | 22652174 | 2026-10-31 |
| 154.49.193.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.49.194.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.49.196.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.49.200.0/21 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.49.209.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.49.219.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.49.220.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.50.1.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.50.5.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.50.37.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.50.42.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.50.50.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.50.53.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.50.55.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.50.56.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.50.98.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.50.109.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-23 |
| 154.50.111.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-01 |
| 154.50.120.0/23 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 154.50.120.0/24 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 154.50.121.0/24 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 154.50.136.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.50.193.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.50.201.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.51.10.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-23 |
| 154.51.11.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-23 |
| 154.51.14.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.16.0/23 v4 | no ROA | 13 | 37721174 | 2026-10-31 |
| 154.51.18.0/23 v4 | no ROA | 13 | 37721174 | 2026-10-31 |
| 154.51.67.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.51.72.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.51.76.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.51.78.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.51.96.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.97.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.98.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.99.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.100.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.101.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.102.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.103.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.104.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.105.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.106.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.107.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.108.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.109.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.110.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.111.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.112.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.113.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.114.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.115.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.116.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.117.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.118.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.119.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.120.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.121.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.122.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.123.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.124.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.125.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.126.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.127.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.51.152.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.51.159.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.51.162.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.51.168.0/21 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.51.176.0/21 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.51.192.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.51.244.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.51.245.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.51.248.0/24 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 154.52.32.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.52.35.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.52.44.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.52.45.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.52.46.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.52.50.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.53.1.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.53.72.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.53.73.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.53.76.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.53.78.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.54.248.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.55.88.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.55.90.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.55.92.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.55.94.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.56.88.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.56.92.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.56.93.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.56.94.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.56.95.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.56.100.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.56.112.0/24 v4 | RPKI invalid | 10 | 58057174 | 2026-10-30 |
| 154.56.113.0/24 v4 | RPKI invalid | 10 | 58057174 | 2026-10-30 |
| 154.56.118.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.56.126.0/23 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 154.56.126.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.56.127.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.56.128.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.56.130.0/24 v4 | no ROA | 1 | 50300174 | 2026-09-18 |
| 154.56.131.0/24 v4 | no ROA | 38 | 34549174 | 2026-09-18 |
| 154.56.133.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.56.148.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.56.193.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.56.199.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.56.200.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.56.208.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.56.215.0/24 v4 | no ROA | 11 | 37721174 | 2026-09-18 |
| 154.56.220.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.56.222.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.56.240.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.56.241.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.56.242.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.56.243.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.56.244.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.56.245.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.56.246.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.56.247.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.56.254.0/23 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 154.56.254.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 154.56.255.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 154.57.15.0/24 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 154.57.24.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.57.26.0/24 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 154.57.27.0/24 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 154.57.28.0/22 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.57.28.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.57.29.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.57.30.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.57.31.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.57.36.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 154.57.39.0/24 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 154.57.56.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.57.85.0/24 v4 | RPKI invalid | 14 | 58057174 | 2026-09-18 |
| 154.57.136.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.58.0.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.58.4.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.58.20.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.58.28.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.58.32.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.58.129.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.58.141.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.58.142.0/24 v4 | no ROA | 12 | 37721174 | 2026-09-23 |
| 154.58.197.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.58.207.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.58.209.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.58.226.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.58.230.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-22 |
| 154.58.230.0/24 v4 | no ROA | 42 | 34549174 | 2026-09-22 |
| 154.58.231.0/24 v4 | no ROA | 42 | 34549174 | 2026-09-22 |
| 154.58.232.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.58.235.0/24 v4 | no ROA | 33 | 34549174 | 2026-09-18 |
| 154.59.94.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.59.102.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.59.103.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.59.104.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.59.106.0/23 v4 | no ROA | 10 | 37721174 | 2026-09-18 |
| 154.59.108.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.59.120.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.59.122.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.59.128.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 154.59.133.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |