CenturyLink / Lumen IP Lookup

CenturyLink / Lumen operates the following Autonomous System Numbers (ASNs): AS209, AS3561, AS11427. Lumen Technologies (formerly CenturyLink/Qwest) operates AS209, one of the original ARPANET ASNs, and provides both residential DSL/fiber and a global enterprise backbone connecting 60+ countries. Use our IP lookup tool to identify which specific ASN a CenturyLink / Lumen IP belongs to.

CenturyLink / Lumen holds multiple IP address blocks allocated by its regional internet registry. These blocks are announced via BGP under AS209 and AS3561 and AS11427. You can identify CenturyLink / Lumen IP addresses using our IP lookup tool — enter any IP and check if the ISP/ASN fields show CenturyLink / Lumen.

Enter the IP address in our IP Lookup tool. The ISP and ASN fields will show whether the IP is registered to CenturyLink / Lumen (look for AS209 or AS3561 or AS11427). You can also use our WHOIS Lookup to query the IP's network registration directly from the RIR database.

CenturyLink / Lumen provides internet services in: United States, Global (enterprise). IP geolocation for CenturyLink / Lumen addresses shows the registered location of the IP block, which may differ from the user's actual city.

CenturyLink / Lumen is a mixed (residential + mobile + enterprise) — its customer IPs are generally classified as residential or mobile, not VPN/proxy. However, customers may run VPN servers on CenturyLink / Lumen IP addresses, which can cause individual IPs to be flagged.