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 |
|---|---|---|---|---|
| 38.236.159.0/24 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 38.240.128.0/21 v4 | no ROA | 13 | 37721174 | 2026-09-19 |
| 38.240.136.0/21 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.240.144.0/20 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.240.144.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.240.145.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.240.146.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.240.147.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.240.148.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.240.149.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.240.150.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.240.151.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.240.152.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.240.153.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.240.154.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.240.155.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.240.156.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.240.157.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.240.158.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.240.159.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.242.23.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.242.28.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.244.0.0/18 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.246.45.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.246.46.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.246.62.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.246.67.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.246.68.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.246.80.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.246.83.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.246.104.0/21 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.246.124.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.246.125.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.246.163.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.246.165.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.246.184.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.246.190.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.246.191.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.246.224.0/20 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.246.240.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.246.247.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.247.28.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.247.66.0/24 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 38.247.72.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.247.80.0/24 v4 | no ROA | 13 | 37721174 | 2026-11-11 |
| 38.247.82.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.247.85.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.248.0.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.248.3.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.248.6.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.248.8.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.248.10.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.248.11.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.248.24.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.248.26.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.248.85.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.248.88.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.248.192.0/18 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.250.94.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.250.117.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.250.248.0/22 v4 | no ROA | 7 | 22652174 | 2026-09-18 |
| 38.251.246.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.252.4.0/24 v4 | no ROA | 31 | 34549174 | 2026-09-18 |
| 38.252.5.0/24 v4 | no ROA | 31 | 34549174 | 2026-09-18 |
| 38.252.68.0/22 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 38.252.68.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 38.252.69.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 38.252.70.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 38.252.71.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 38.252.81.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.252.232.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.252.233.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.252.234.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.252.235.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.253.74.0/23 v4 | no ROA | 40 | 34549174 | 2026-10-08 |
| 38.253.74.0/24 v4 | no ROA | 40 | 34549174 | 2026-10-08 |
| 38.253.75.0/24 v4 | no ROA | 40 | 34549174 | 2026-10-08 |
| 38.253.88.0/24 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 38.253.89.0/24 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 38.253.90.0/24 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 38.253.91.0/24 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 38.253.92.0/24 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 38.253.93.0/24 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 38.253.94.0/24 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 38.253.95.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 38.254.100.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-31 |
| 38.254.101.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-31 |
| 38.254.102.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-31 |
| 38.254.103.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-31 |
| 38.254.108.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 38.254.109.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 38.254.110.0/24 v4 | no ROA | 38 | 34549174 | 2026-09-18 |
| 38.254.111.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 38.255.18.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 45.45.194.0/24 v4 | RPKI valid | 41 | 34549174 | 2026-09-18 |
| 45.59.138.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-29 |
| 45.91.121.0/24 v4 | RPKI valid | 42 | 34549174 | 2026-09-18 |
| 45.93.148.0/24 v4 | RPKI valid | 42 | 34549174 | 2026-09-18 |
| 45.131.180.0/24 v4 | RPKI valid | 42 | 34549174 | 2026-09-18 |
| 45.133.76.0/22 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 45.133.204.0/22 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 45.140.132.0/24 v4 | RPKI valid | 42 | 34549174 | 2026-09-18 |
| 45.147.95.0/24 v4 | RPKI valid | 39 | 34549174 | 2026-09-18 |
| 46.17.32.0/21 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 46.151.99.0/24 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 46.151.100.0/24 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 46.151.103.0/24 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 46.202.85.0/24 v4 | RPKI valid | 41 | 34549174 | 2026-09-18 |
| 46.202.86.0/24 v4 | RPKI valid | 41 | 34549174 | 2026-09-18 |
| 46.202.218.0/24 v4 | RPKI valid | 41 | 34549174 | 2026-11-07 |
| 46.202.226.0/24 v4 | RPKI valid | 41 | 34549174 | 2026-11-07 |
| 46.229.240.0/24 v4 | RPKI valid | 41 | 34549174 | 2026-09-18 |
| 50.2.121.0/24 v4 | RPKI valid | 41 | 34549174 | 2026-10-02 |
| 50.114.38.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 52.128.192.0/22 v4 | RPKI valid | 41 | 34549174 | 2026-10-03 |
| 52.128.220.0/22 v4 | RPKI valid | 41 | 34549174 | 2026-09-18 |
| 61.13.160.0/22 v4 | RPKI valid | 41 | 34549174 | 2026-10-07 |
| 61.13.164.0/22 v4 | RPKI valid | 41 | 34549174 | 2026-10-07 |
| 61.13.168.0/22 v4 | RPKI valid | 41 | 34549174 | 2026-10-07 |
| 61.13.172.0/22 v4 | RPKI valid | 41 | 34549174 | 2026-10-07 |
| 61.16.40.0/22 v4 | RPKI valid | 41 | 34549174 | 2026-09-18 |
| 61.16.44.0/22 v4 | RPKI valid | 41 | 34549174 | 2026-09-18 |
| 62.73.0.0/20 v4 | no ROA | 42 | 34549174 | 2026-09-18 |
| 63.117.79.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 63.160.0.0/12 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 63.160.43.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 63.160.93.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 63.161.1.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 63.161.112.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 63.161.164.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 63.161.165.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 63.161.166.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 63.161.167.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 63.161.176.0/20 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 63.163.200.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 63.164.208.0/20 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 63.167.242.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 63.170.19.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 63.171.238.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 63.172.84.0/23 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 63.172.84.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 63.172.85.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 63.172.226.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 64.4.192.0/19 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 64.17.48.0/20 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 64.22.72.0/24 v4 | RPKI valid | 41 | 34549174 | 2026-09-18 |
| 64.92.68.0/24 v4 | no ROA | 28 | 37721174 | 2026-09-18 |
| 64.112.92.0/22 v4 | RPKI valid | 41 | 34549174 | 2026-09-18 |
| 64.202.0.0/19 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 64.204.178.0/24 v4 | RPKI valid | 41 | 34549174 | 2026-09-18 |
| 64.245.128.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 64.254.192.0/19 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 65.160.0.0/13 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 65.160.43.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 65.160.91.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 65.162.109.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 65.163.164.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 65.166.89.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 65.166.97.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 65.166.98.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 65.166.254.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 65.167.196.0/22 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 65.167.208.0/23 v4 | no ROA | 37 | 34549174 | 2026-09-18 |
| 65.167.208.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 65.167.209.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 65.168.0.0/14 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 65.168.58.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 65.170.40.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 65.170.63.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 65.172.0.0/15 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 65.172.71.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 65.172.132.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 65.174.0.0/16 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 65.174.219.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 65.175.3.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 66.7.91.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 66.7.92.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 66.7.93.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 66.28.0.0/16 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 66.28.50.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 66.28.99.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 66.71.224.0/20 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 66.102.96.0/19 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 66.102.120.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 66.102.121.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 66.102.122.0/24 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 66.102.123.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 66.102.124.0/24 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 66.102.125.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 66.102.126.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 66.102.127.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 66.132.0.0/17 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 66.232.27.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 66.243.224.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 66.245.244.0/22 v4 | RPKI valid | 40 | 34549174 | 2026-09-18 |
| 66.245.248.0/21 v4 | RPKI valid | 40 | 34549174 | 2026-09-18 |
| 66.247.0.0/16 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 66.250.0.0/16 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 66.250.57.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 66.250.94.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |