AS174 Cogent Communications, LLC 🇺🇸 US
Announcing 4,356 prefixes, seen at the RIS collectors.
IPv4 prefixes
3,827
37,670,912 (147,152 × /24)
IPv6 prefixes
529
58 × /32
Upstreams
89
transit providers observed
Peers
23
settlement-free adjacencies
Downstreams
6,442
transit customers observed
Customer cone
67,150
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
3,827 in total
| Prefix | RPKI | Peers | Sample path | First seen |
|---|---|---|---|---|
| 38.46.128.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.46.143.0/24 v4 | no ROA | 27 | 34549174 | 2026-11-10 |
| 38.46.148.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.46.156.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.46.157.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.46.168.0/22 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 38.46.200.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.46.201.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 38.46.206.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.46.214.0/24 v4 | RPKI valid | 40 | 34549174 | 2026-11-04 |
| 38.46.224.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.46.228.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.46.232.0/22 v4 | no ROA | 40 | 34549174 | 2026-10-05 |
| 38.46.232.0/24 v4 | no ROA | 9 | 58057174 | 2026-10-05 |
| 38.46.233.0/24 v4 | no ROA | 9 | 58057174 | 2026-10-05 |
| 38.46.234.0/24 v4 | no ROA | 9 | 58057174 | 2026-10-05 |
| 38.46.235.0/24 v4 | no ROA | 9 | 58057174 | 2026-10-05 |
| 38.50.164.0/24 v4 | RPKI valid | 38 | 34549174 | 2026-10-27 |
| 38.51.54.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 38.51.55.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 38.51.190.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.51.191.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.51.227.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.51.236.0/24 v4 | RPKI invalid | 6 | 58057174 | 2026-10-09 |
| 38.51.237.0/24 v4 | RPKI invalid | 6 | 58057174 | 2026-10-09 |
| 38.51.238.0/24 v4 | RPKI invalid | 14 | 58057174 | 2026-10-09 |
| 38.51.239.0/24 v4 | RPKI invalid | 6 | 58057174 | 2026-10-09 |
| 38.52.144.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.52.170.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.52.171.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.52.192.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-15 |
| 38.55.72.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.55.74.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.55.76.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.56.24.0/22 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.56.24.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.56.25.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.56.26.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.56.27.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.56.28.0/22 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.56.28.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.56.29.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.56.30.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.56.31.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.57.32.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.57.55.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.57.56.0/22 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.57.56.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 38.57.57.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 38.57.58.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 38.57.59.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 38.57.72.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.57.74.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.57.77.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.57.78.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.57.148.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.57.161.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.57.174.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.57.184.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.57.186.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.57.204.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.57.216.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.57.224.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.57.237.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.57.252.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.58.37.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-20 |
| 38.58.56.0/21 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.58.76.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.58.77.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.58.96.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.58.97.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.58.100.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.58.102.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.58.105.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.58.108.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.58.129.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.58.136.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.58.137.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.58.151.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.58.184.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.58.185.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.58.198.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.58.198.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.58.199.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.58.208.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.58.209.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.58.210.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.58.211.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.58.212.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.58.213.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.58.214.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.58.215.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.58.216.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.58.217.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.58.218.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.58.219.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.58.220.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.58.221.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.58.222.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.58.223.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.58.233.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.58.236.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.64.10.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.64.32.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.64.52.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.64.83.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.64.84.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.64.85.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.64.87.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.64.90.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.64.93.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.64.100.0/22 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.64.100.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.64.101.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.64.102.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.64.103.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.64.104.0/21 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.64.139.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.64.154.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.64.160.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.64.162.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.64.163.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.64.165.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.64.174.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.64.184.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.64.186.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.64.187.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.64.192.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.64.204.0/22 v4 | no ROA | 26 | 37721174 | 2026-09-18 |
| 38.64.204.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.64.205.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.64.206.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.64.207.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.64.221.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.65.6.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.65.8.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.65.28.0/24 v4 | no ROA | 2 | 50300174 | 2026-09-18 |
| 38.65.33.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.65.37.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.65.59.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.65.68.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.65.103.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.65.115.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.65.140.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.65.141.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.65.143.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.65.172.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.65.193.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.65.211.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.65.216.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.65.217.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.65.222.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.65.243.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.65.248.0/21 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.65.248.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.65.252.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-28 |
| 38.65.253.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-28 |
| 38.65.254.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.65.255.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.66.70.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.66.73.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.66.84.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.66.88.0/21 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.66.104.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.66.108.0/22 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.66.108.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.66.109.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.66.110.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.66.111.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.66.198.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.66.202.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.66.222.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.66.249.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.66.254.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.67.4.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.67.19.0/24 v4 | no ROA | 8 | 22652174 | 2026-09-18 |
| 38.67.20.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.67.22.0/24 v4 | no ROA | 13 | 37721174 | 2026-11-05 |
| 38.67.133.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.67.224.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.67.241.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.68.36.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.68.50.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.68.62.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.68.65.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.68.78.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.68.79.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.68.81.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.68.82.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.68.90.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.68.92.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.68.132.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.68.136.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.68.138.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.68.140.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.68.142.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.68.148.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.68.150.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.68.152.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.68.153.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |