ASN lookup: AS209

    An ASN lookup shows information about an Autonomous System, including the organization name, country and announced network prefixes.

    About AS209

    AS209 is an autonomous system number: a globally unique identifier for a network that runs its own routing policy on the public internet.

    AS209 belongs to the original 16-bit ASN space (1–65535) and is written 0.209 in asdot+ notation.

    PipeIP recorded the registry handle CENTURYLINK-US-LEGACY-QWEST and the organization CenturyLink Communications, LLC for AS209 on 2026-08-20.

    Which address blocks AS209 announces through BGP changes over time, so prefix data is fetched live below rather than stored on this page.

    Other networks documented on PipeIP:

    AS701AS1299AS2914AS3257AS3320
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    Live lookup data

    ASN

    AS209

    Organization

    CENTURYLINK-US-LEGACY-QWEST - CenturyLink Communications, LLC

    Announced prefixes

    1624

    Example prefixes

    144.163.0.0/16174.29.0.0/1664.91.124.0/2363.230.128.0/2165.40.151.0/2465.100.120.0/2171.2.210.0/2363.227.54.0/2363.224.26.0/23184.103.0.0/16

    AS209 is an Autonomous System operated by CENTURYLINK-US-LEGACY-QWEST - CenturyLink Communications, LLC. This page provides an overview of its 1624 announced IP ranges, network details, and routing information. Use this lookup to understand ownership and infrastructure behind AS209.

    Related lookups

    144.163.0.1174.29.0.164.91.124.163.230.128.165.40.151.165.100.120.171.2.210.163.227.54.1

    Related concepts

    ASNBGPRoutingPeeringTransit

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