Autonomous system
AS209 CENTURYLINK-US-LEGACY-QWEST
Residential ARIN
IPv4 addresses
15.44M
4,915 prefixes
IPv6 prefixes
97
counted as prefixes, not addresses
Countries
1
mostly US
Flagged prefixes
0
none
Summary
Lumen / CenturyLink (Qwest legacy)
isp eyeball transit
A large US access and transit network now operated by Lumen Technologies,
carrying the legacy Qwest / CenturyLink consumer and business broadband base.
What it's used for
- Residential and business internet (DSL and fibre) across the former Qwest territory in the western and central United States.
- Enterprise and wholesale connectivity under the Lumen/CenturyLink brand.
Notable
- This is an "eyeball" network — most IPs are subscribers, not servers.
- Distinct from AS3356 (the Level 3 backbone, also Lumen): 209 carries the CenturyLink/Qwest access side, 3356 is the global transit core. Both rolled up into Lumen after the CenturyLink–Level 3 merger.
Interesting
- Qwest was one of the 1990s fibre-boom long-haul carriers; its network survives inside Lumen today under this decades-old AS number.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Address space
Summary
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 5,012 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS209- Registry name
- CENTURYLINK-US-LEGACY-QWEST
- Registrant
- CenturyLink Communications, LLC
- Abuse contact
- abuse@aup.lumen.com
- Registered
- 1998-11-13
- Last changed
- 2018-10-04
- Status
- active
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
No IC3 indicators Nothing from the FBI IC3 feed.
Threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere