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 |
|---|---|---|---|---|
| 38.183.121.0/24 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 38.183.122.0/24 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 38.183.123.0/24 v4 | no ROA | 39 | 34549174 | 2026-09-18 |
| 38.183.124.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.183.125.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.183.126.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.183.127.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.183.154.0/23 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.183.154.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.183.155.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.183.180.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.183.181.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.183.211.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-07 |
| 38.185.59.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.186.160.0/19 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.187.244.0/22 v4 | no ROA | 13 | 37721174 | 2026-10-07 |
| 38.187.248.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.187.249.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.187.251.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.188.40.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.41.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.42.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.43.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.44.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.45.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.46.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.47.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.50.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.188.51.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.188.64.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.65.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.66.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.67.0/24 v4 | no ROA | 40 | 34549174 | 2026-10-01 |
| 38.188.68.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.69.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.70.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.71.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.72.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.73.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.74.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.75.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.76.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.77.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.78.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.79.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.80.0/24 v4 | no ROA | 27 | 34549174 | 2026-10-01 |
| 38.188.81.0/24 v4 | no ROA | 27 | 34549174 | 2026-10-01 |
| 38.188.82.0/24 v4 | no ROA | 27 | 34549174 | 2026-10-01 |
| 38.188.83.0/24 v4 | no ROA | 27 | 34549174 | 2026-10-01 |
| 38.188.84.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.85.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.86.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.87.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.88.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.89.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.90.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.91.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.92.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.93.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.94.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.95.0/24 v4 | no ROA | 28 | 34549174 | 2026-10-01 |
| 38.188.102.0/23 v4 | no ROA | 1 | 6121869391299174 | 2026-11-10 |
| 38.188.160.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.161.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.162.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.163.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.164.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.165.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.166.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.167.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.168.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.169.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.170.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.171.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.172.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.173.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.174.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.175.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.188.207.0/24 v4 | no ROA | 36 | 34549174 | 2026-10-05 |
| 38.189.32.0/19 v4 | no ROA | 12 | 37721174 | 2026-10-23 |
| 38.190.128.0/22 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.190.132.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.190.134.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.190.150.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.190.151.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.190.180.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.190.182.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.191.45.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.191.164.0/23 v4 | no ROA | 29 | 58057174 | 2026-10-05 |
| 38.191.164.0/24 v4 | no ROA | 9 | 58057174 | 2026-10-05 |
| 38.191.165.0/24 v4 | no ROA | 9 | 58057174 | 2026-10-05 |
| 38.191.230.0/23 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.196.158.0/24 v4 | no ROA | 33 | 34549174 | 2026-09-18 |
| 38.196.184.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.196.208.0/21 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.196.208.0/24 v4 | no ROA | 37 | 34549174 | 2026-09-18 |
| 38.196.209.0/24 v4 | no ROA | 37 | 34549174 | 2026-09-18 |
| 38.196.210.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.196.211.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.196.212.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.196.213.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.196.214.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.196.215.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.200.23.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.203.0.0/22 v4 | no ROA | 24 | 58057174 | 2026-09-18 |
| 38.203.0.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.203.1.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.203.2.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.203.3.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.204.0.0/22 v4 | no ROA | 24 | 58057174 | 2026-09-18 |
| 38.204.0.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.204.1.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.204.2.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.204.3.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.207.0.0/18 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.207.144.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.207.145.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.207.146.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.207.147.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.207.148.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.207.149.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.207.150.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.207.151.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.207.152.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.207.153.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.207.154.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.207.155.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.207.156.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.207.157.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.207.158.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.207.159.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.209.64.0/21 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.209.112.0/20 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.210.120.0/23 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 38.210.120.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 38.210.121.0/24 v4 | no ROA | 1 | 21628582806762174 | 2026-11-10 |
| 38.211.28.0/22 v4 | no ROA | 33 | 34549174 | 2026-09-18 |
| 38.211.28.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.211.29.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.211.30.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.211.31.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.211.47.0/24 v4 | no ROA | 18 | 58057174 | 2026-09-18 |
| 38.211.50.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.211.100.0/24 v4 | no ROA | 40 | 34549174 | 2026-09-18 |
| 38.211.125.0/24 v4 | no ROA | 34 | 34549174 | 2026-09-18 |
| 38.211.252.0/24 v4 | no ROA | 33 | 34549174 | 2026-09-18 |
| 38.213.1.0/24 v4 | no ROA | 12 | 37721174 | 2026-10-23 |
| 38.213.2.0/24 v4 | no ROA | 12 | 37721174 | 2026-10-23 |
| 38.213.8.0/24 v4 | no ROA | 12 | 37721174 | 2026-10-23 |
| 38.213.9.0/24 v4 | no ROA | 12 | 37721174 | 2026-10-23 |
| 38.213.10.0/24 v4 | no ROA | 12 | 37721174 | 2026-10-23 |
| 38.213.22.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-29 |
| 38.213.23.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-29 |
| 38.213.24.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.26.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.27.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.28.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.29.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.30.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.31.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.33.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.35.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.36.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.37.0/24 v4 | no ROA | 12 | 37721174 | 2026-10-23 |
| 38.213.38.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.39.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.40.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.41.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.42.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.43.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.44.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.45.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.46.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.47.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.48.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.50.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.52.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.54.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.55.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.58.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.59.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.64.0/21 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.65.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.71.0/24 v4 | no ROA | 13 | 37721174 | 2026-10-18 |
| 38.213.72.0/24 v4 | no ROA | 12 | 37721174 | 2026-10-23 |
| 38.213.74.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.75.0/24 v4 | no ROA | 13 | 37721174 | 2026-11-06 |
| 38.213.76.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.77.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-29 |
| 38.213.78.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.81.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.82.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.83.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.84.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.85.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.86.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.87.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.88.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.89.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |
| 38.213.91.0/24 v4 | no ROA | 13 | 37721174 | 2026-09-18 |