Country
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ASN LANDING PAGE
AS209
CENTURYLINK-US-LEGACY-QWEST - CenturyLink Communications
Last updated · Apr 4, 2026
Total prefixes
1663
IPv4 prefixes
1631
IPv6 prefixes
32
ASN summary
How to read the scale of AS209
CENTURYLINK-US-LEGACY-QWEST - CenturyLink Communications currently shows 1663 prefixes and 41 upstream, downstream, or peer relationships. Larger prefix inventories often indicate broader network footprint, but they should still be read together with country and peering context.
When is an ASN page most useful?
ASN landing pages are more useful than a single IP page when you want cloud provider attribution, routing research, infrastructure comparison, or network topology analysis at the organization level.
How should you read the country, organization, and role of AS209?
CENTURYLINK-US-LEGACY-QWEST - CenturyLink Communications is currently associated with an unknown region. Country data is only a starting point; the more important signals are the organization name, website, prefix volume, and peering relationships that reveal whether the network behaves like a cloud platform, ISP, CDN, or enterprise backbone.
What should you inspect next after the AS209 page?
This page is currently showing live ASN data that can be used for peer, prefix, and network scale analysis. The most useful next step is usually to return to a related IP landing page, then compare that concrete address with this ASN profile and with broader topic pages for routing, cloud attribution, or WHOIS ownership analysis.
Search intents this ASN page helps cover
AS209 ASN lookupAS209 BGPAS209 peersAS209 prefixesAS209 upstreamsCENTURYLINK-US-LEGACY-QWEST - CenturyLink Communications ASN
Upstreams
Detailed data for this ASN is not available right now.
Downstreams
AS22561
AS22561
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AS6223
AS6223
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AS3561
AS3561
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AS297
AS297
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AS4297
AS4297
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AS18530
AS18530
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AS6224
AS6224
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AS32083
AS32083
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AS13866
AS13866
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AS396908
AS396908
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AS30221
AS30221
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AS11857
AS11857
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AS19800
AS19800
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AS26848
AS26848
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AS46182
AS46182
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AS4296
AS4296
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AS3909
AS3909
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AS54983
AS54983
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AS36811
AS36811
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AS7359
AS7359
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AS7743
AS7743
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AS4015
AS4015
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AS11985
AS11985
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AS62645
AS62645
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AS13325
AS13325
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AS397045
AS397045
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AS13684
AS13684
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AS12086
AS12086
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AS400008
AS400008
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AS10695
AS10695
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AS54427
AS54427
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AS32904
AS32904
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AS396402
AS396402
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AS63486
AS63486
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AS33222
AS33222
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AS3743
AS3743
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AS11255
AS11255
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AS395562
AS395562
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AS27011
AS27011
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AS6373
AS6373
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Peers
Prefix inventory
| Prefix | Name | Country |
|---|---|---|
| 130.13.128.0/19 | AS209 | — |
| 130.13.160.0/24 | AS209 | — |
| 137.107.65.0/24 | AS209 | — |
| 138.210.0.0/16 | AS209 | — |
| 138.210.132.0/23 | AS209 | — |
| 138.210.134.0/24 | AS209 | — |
| 138.210.71.0/24 | AS209 | — |
| 143.61.91.0/24 | AS209 | — |
| 144.163.0.0/16 | AS209 | — |
| 146.174.238.0/23 | AS209 | — |
| 148.156.96.0/23 | AS209 | — |
| 149.64.224.0/24 | AS209 | — |
| 161.203.14.0/23 | AS209 | — |
| 161.203.16.0/23 | AS209 | — |
| 161.203.18.0/23 | AS209 | — |
| 161.203.22.0/23 | AS209 | — |
| 161.203.24.0/23 | AS209 | — |
| 161.203.26.0/23 | AS209 | — |
| 162.104.0.0/16 | AS209 | — |
| 162.242.94.0/23 | AS209 | — |
| 168.103.0.0/16 | AS209 | — |
| 168.103.128.0/20 | AS209 | — |
| 168.103.144.0/20 | AS209 | — |
| 168.103.160.0/20 | AS209 | — |
| 168.103.176.0/20 | AS209 | — |
| 168.103.192.0/19 | AS209 | — |
| 168.103.20.0/23 | AS209 | — |
| 168.103.224.0/20 | AS209 | — |
| 168.103.240.0/22 | AS209 | — |
| 168.103.244.0/22 | AS209 | — |
| 168.103.28.0/22 | AS209 | — |
| 168.103.36.0/22 | AS209 | — |
| 168.103.4.0/22 | AS209 | — |
| 168.103.40.0/21 | AS209 | — |
| 168.103.52.0/22 | AS209 | — |
| 168.103.56.0/21 | AS209 | — |
| 168.103.64.0/19 | AS209 | — |
| 168.103.96.0/19 | AS209 | — |
| 168.251.0.0/16 | AS209 | — |
| 173.202.0.0/16 | AS209 | — |
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Related lookups and next steps
WHOIS vs ASN Ownership Guide
Continue from this ASN into the differences between WHOIS ownership and ASN ownership.
Routing Troubleshooting and Network Analysis
Continue from this ASN into route troubleshooting and network analysis.
Cloud Network and ASN Comparison
Useful when you want to compare this ASN against larger cloud and edge networks.
WHOIS and IP Ownership Guide
Continue from the ASN page into WHOIS and ownership verification.
Frequently asked questions about this ASN page
What does AS209 represent?
AS209 is an autonomous system number used to identify an independently operated network. The current page associates it with CENTURYLINK-US-LEGACY-QWEST - CenturyLink Communications in an unknown region, which helps determine whether it behaves like a cloud provider, ISP, CDN, or enterprise backbone.
What are peers, upstreams, and prefixes useful for on the AS209 page?
They help explain the scale, interconnection depth, and route structure of AS209. Richer peering and upstream data often indicate broader network reach, but they should still be interpreted together with prefixes and related IP landing pages.
What should you do after reviewing AS209?
The best next step is usually to return to a concrete IP landing page to see how a specific address maps into AS209, then continue into cloud, WHOIS, or routing topic pages to understand the network in a broader context.
Related topics
WHOIS vs ASN Ownership Guide
Understand why WHOIS ownership and ASN ownership can differ, and how to combine both when deciding who really owns or operates an IP.
WHOIS and IP Ownership Guide
Use WHOIS, ASN, prefixes, and organization data to determine who ultimately owns an IP, range, or resolved domain target.
BGP and ASN Basics Guide
Learn what ASN, BGP routes, prefixes, upstreams, downstreams, and peers mean, then explore real ASN pages.
Cloud Network and ASN Comparison
Compare large cloud and edge networks such as Google, Cloudflare, Microsoft, and Amazon through their ASN landing pages.