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 |
|---|---|---|---|---|
| 38.121.118.0/24 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 38.121.119.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.121.120.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.121.124.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.121.139.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.121.145.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.121.170.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.121.190.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.121.193.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.123.2.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.123.3.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.123.4.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.123.6.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.123.7.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.123.18.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.123.19.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.123.23.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.123.40.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.123.60.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-30 |
| 38.123.61.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-30 |
| 38.123.69.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.123.77.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.123.104.0/24 v4 | no ROA | 41 | 34549174 | 2026-11-10 |
| 38.123.105.0/24 v4 | no ROA | 41 | 34549174 | 2026-11-10 |
| 38.123.135.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.123.143.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.123.173.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.123.175.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.123.192.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-20 |
| 38.123.205.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-20 |
| 38.123.206.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-20 |
| 38.123.207.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-20 |
| 38.123.221.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-20 |
| 38.123.222.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-20 |
| 38.123.227.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.123.230.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.123.231.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.123.235.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.123.255.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.2.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.6.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.10.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.30.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.32.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.40.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.53.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.60.0/23 v4 | no ROA | 1 | 50300174 | 2026-09-18 |
| 38.124.64.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.68.0/22 v4 | no ROA | 1 | 50300174 | 2026-09-18 |
| 38.124.72.0/22 v4 | no ROA | 1 | 50300174 | 2026-09-18 |
| 38.124.79.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.105.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.108.0/23 v4 | no ROA | 1 | 50300174 | 2026-09-18 |
| 38.124.110.0/23 v4 | no ROA | 1 | 50300174 | 2026-09-18 |
| 38.124.128.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.147.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.153.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.156.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.192.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.194.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.196.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.202.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.203.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.204.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.205.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.208.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.232.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.233.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.234.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.124.235.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.125.0.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.125.2.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.125.8.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.125.14.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.125.18.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.125.32.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.125.47.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.125.49.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-17 |
| 38.125.55.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.125.64.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.125.90.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.125.100.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.125.102.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.125.119.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.125.161.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.125.177.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.125.212.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.125.235.0/24 v4 | no ROA | 19 | 34549174 | 2026-09-22 |
| 38.126.10.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.13.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.34.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 38.126.37.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.39.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.48.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.49.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.52.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.53.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.56.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.57.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.58.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.59.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.60.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.61.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.62.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.67.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.106.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.126.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.136.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.151.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.154.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.161.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.199.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.208.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.210.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.216.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.126.229.0/24 v4 | no ROA | 9 | 37721174 | 2026-09-18 |
| 38.127.22.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.127.67.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.127.93.0/24 v4 | no ROA | 9 | 37721174 | 2026-09-18 |
| 38.127.100.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.127.114.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.127.118.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.127.120.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.127.121.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.127.123.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.127.124.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.127.148.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.127.159.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.127.164.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.127.172.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.127.176.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.127.179.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.127.187.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.127.199.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.127.222.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.127.225.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.127.230.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.127.237.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.128.4.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.128.9.0/24 v4 | no ROA | 25 | 34549174 | 2026-09-23 |
| 38.128.11.0/24 v4 | no ROA | 25 | 34549174 | 2026-09-23 |
| 38.128.99.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.128.106.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.128.108.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.128.112.0/24 v4 | no ROA | 9 | 58057174 | 2026-10-13 |
| 38.128.113.0/24 v4 | no ROA | 9 | 58057174 | 2026-10-13 |
| 38.128.114.0/24 v4 | no ROA | 15 | 58057174 | 2026-10-13 |
| 38.128.115.0/24 v4 | no ROA | 15 | 58057174 | 2026-10-13 |
| 38.128.116.0/24 v4 | no ROA | 12 | 58057174 | 2026-10-13 |
| 38.128.117.0/24 v4 | no ROA | 12 | 58057174 | 2026-10-13 |
| 38.128.118.0/24 v4 | no ROA | 15 | 58057174 | 2026-10-13 |
| 38.128.119.0/24 v4 | no ROA | 15 | 58057174 | 2026-10-13 |
| 38.128.152.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-22 |
| 38.128.156.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.128.240.0/21 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.129.6.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.129.12.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.129.45.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.129.46.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.129.53.0/24 v4 | no ROA | 1 | 2162858280174 | 2026-11-10 |
| 38.129.68.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.129.72.0/21 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.129.90.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.129.167.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.129.176.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.129.177.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.129.178.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.129.179.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.129.184.0/21 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.130.68.0/22 v4 | no ROA | 1 | 50300174 | 2026-09-18 |
| 38.130.72.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.130.74.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.130.80.0/22 v4 | no ROA | 1 | 50300174 | 2026-09-18 |
| 38.130.88.0/22 v4 | no ROA | 1 | 50300174 | 2026-09-18 |
| 38.130.99.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.130.104.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.130.107.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.130.116.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.130.132.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.130.138.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.130.150.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.130.154.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.130.156.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.130.244.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.130.254.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.130.255.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.131.0.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.131.2.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.131.39.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.131.49.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.131.60.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.131.148.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.131.151.0/24 v4 | no ROA | 19 | 34549174 | 2026-09-18 |
| 38.131.152.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.131.153.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.131.154.0/24 v4 | no ROA | 19 | 34549174 | 2026-09-18 |
| 38.131.160.0/21 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.131.168.0/21 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.131.176.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.131.220.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |