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 |
|---|---|---|---|---|
| 38.131.223.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.132.42.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.132.192.0/21 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.132.200.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.132.205.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.132.212.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.132.213.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.132.232.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.133.80.0/20 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.133.120.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.133.135.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.133.139.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.133.140.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.133.145.0/24 v4 | no ROA | 2 | 50300174 | 2026-09-18 |
| 38.133.150.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.133.168.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.133.179.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.133.180.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.133.182.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.133.183.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.133.186.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.133.203.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.133.214.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.133.218.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.133.222.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.133.234.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.134.48.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-17 |
| 38.134.49.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-29 |
| 38.134.101.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.134.116.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-17 |
| 38.134.122.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.134.125.0/24 v4 | no ROA | 38 | 34549174 | 2026-09-18 |
| 38.134.129.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.134.146.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.134.148.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.134.150.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.134.187.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.134.192.0/22 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 38.134.216.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.134.225.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-30 |
| 38.134.242.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.134.251.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-03 |
| 38.134.252.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.134.253.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.134.254.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.135.38.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.135.74.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.135.75.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-28 |
| 38.135.82.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.135.88.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.135.108.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.135.110.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.135.116.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.135.118.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.135.180.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.135.193.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.135.194.0/24 v4 | no ROA | 1 | 2162858280174 | 2026-11-10 |
| 38.137.168.0/21 v4 | no ROA | 37 | 34549174 | 2026-09-18 |
| 38.137.168.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 38.137.169.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 38.137.170.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 38.137.171.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 38.137.172.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 38.137.173.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 38.137.174.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 38.137.175.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 38.141.63.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.143.4.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.143.5.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.143.6.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.143.16.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.143.20.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.143.24.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.143.25.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.143.26.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.143.28.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.143.39.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.143.41.0/24 v4 | no ROA | 33 | 34549174 | 2026-09-24 |
| 38.143.63.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.143.107.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.143.108.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.143.110.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.143.130.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.143.133.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.143.137.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.143.140.0/24 v4 | RPKI valid | 13 | 37721174 | 2026-09-18 |
| 38.143.144.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.143.148.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.143.149.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.143.150.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.143.166.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.145.100.0/23 v4 | no ROA | 38 | 34549174 | 2026-09-18 |
| 38.145.100.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.145.101.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.145.124.0/23 v4 | no ROA | 19 | 34549174 | 2026-09-18 |
| 38.145.124.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.145.125.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.145.136.0/21 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.146.0.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.146.3.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-09 |
| 38.146.25.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.146.26.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.146.27.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.146.28.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.146.52.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.146.54.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.146.57.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.146.68.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.146.70.0/23 v4 | no ROA | 1 | 2162858280174 | 2026-11-10 |
| 38.146.86.0/23 v4 | no ROA | 13 | 37721174 | 2026-10-06 |
| 38.146.194.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.146.203.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.146.205.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.146.210.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.146.220.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.147.8.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.147.12.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.147.48.0/21 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.147.73.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.147.81.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.147.82.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.147.83.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.147.86.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.147.87.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.147.88.0/21 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.147.101.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.147.116.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.147.132.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.147.141.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.147.192.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.193.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.194.0/24 v4 | no ROA | 15 | 34549174 | 2026-09-18 |
| 38.147.195.0/24 v4 | no ROA | 15 | 34549174 | 2026-09-18 |
| 38.147.196.0/24 v4 | no ROA | 15 | 34549174 | 2026-09-18 |
| 38.147.197.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.198.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.199.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.200.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.201.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.202.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.203.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.204.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.205.0/24 v4 | no ROA | 15 | 34549174 | 2026-09-18 |
| 38.147.206.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.207.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.208.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.209.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.210.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.211.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.212.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.213.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.214.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.215.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.216.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.217.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.218.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.219.0/24 v4 | no ROA | 13 | 34549174 | 2026-09-18 |
| 38.147.220.0/24 v4 | no ROA | 27 | 37721174 | 2026-09-18 |
| 38.147.221.0/24 v4 | no ROA | 27 | 37721174 | 2026-09-18 |
| 38.147.222.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.147.223.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.150.0.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.150.1.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.150.2.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.150.3.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.150.4.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.150.5.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.150.6.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.150.7.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.150.17.0/24 v4 | RPKI valid | 13 | 37721174 | 2026-09-18 |
| 38.150.23.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-21 |
| 38.150.32.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.150.112.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.150.113.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.156.68.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.156.69.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.156.71.0/24 v4 | no ROA | 21 | 58057174 | 2026-09-24 |
| 38.156.72.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 38.156.73.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 38.156.74.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 38.156.75.0/24 v4 | no ROA | 41 | 34549174 | 2026-09-18 |
| 38.156.78.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.156.78.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.156.79.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.156.240.0/23 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 38.156.240.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 38.156.241.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 38.159.114.0/24 v4 | no ROA | 1 | 2162858280174 | 2026-11-10 |
| 38.159.116.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.159.117.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.159.118.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.159.164.0/24 v4 | no ROA | 36 | 34549174 | 2026-09-18 |
| 38.159.178.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 38.159.182.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 38.159.229.0/24 v4 | no ROA | 38 | 34549174 | 2026-09-18 |
| 38.160.74.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.175.204.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.175.208.0/20 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.183.120.0/22 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 38.183.120.0/24 v4 | no ROA | 24 | 34549174 | 2026-09-18 |