Cogent Communications IP Ranges
Cogent Communications is one of the largest internet backbone and transit providers in the world, operating AS174. It carries a significant share of global internet traffic and serves data centers and enterprises.
- Provider
- Cogent Communications
- Primary ASN
- AS174
- Category
- Transit
- Headquarters
- Washington, DC, USA
Known IP ranges
The following IP prefixes are registered to Cogent Communications or commonly associated with their network. Full prefix sets change over time — use WHOIS Lookup for the authoritative current record for any specific IP.
38.0.0.0/8
66.28.0.0/16
149.6.0.0/16
154.24.0.0/13
38.104.0.0/13
What does a Cogent Communications IP mean in a privacy test?
A Cogent IP (AS174) usually appears as a transit hop in a traceroute rather than as an exit IP. If you see AS174 as your visible address, you may be behind a data center or hosting service that buys transit from Cogent.
Related tools
Frequently asked questions
What IP ranges does Cogent use?
Cogent operates the large 38.0.0.0/8 block plus ranges such as 66.28.0.0/16 and 149.6.0.0/16 under AS174. Cogent also announces routes for its transit customers.
Why does Cogent appear in my traceroute?
Cogent is one of the largest global transit providers. Internet traffic frequently crosses Cogent backbone routers between networks. Seeing AS174 in a traceroute is normal.
Is a Cogent IP a VPN or data center address?
Cogent primarily provides transit and data-center connectivity. An IP directly on AS174 usually belongs to a server or hosting environment rather than a home connection.
How do I look up a Cogent IP address?
Use MyIPScan IP Geolocation Lookup. Cogent IPs return AS174 (Cogent Communications) with the connected facility city.
What ASN does Cogent use?
Cogent uses AS174 as its primary transit ASN. The AS174 page on MyIPScan covers this backbone network.