Country
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ASN LANDING PAGE
AS3561
CENTURYLINK-LEGACY-SAVVIS - CenturyLink Communications, LLC
Last updated · Jul 20, 2026
Total prefixes
623
IPv4 prefixes
621
IPv6 prefixes
2
ASN summary
How to read the scale of AS3561
CENTURYLINK-LEGACY-SAVVIS - CenturyLink Communications, LLC currently reports 623 prefixes and 45 upstream, downstream, or peer relationships. These counts describe the current dataset; they do not by themselves prove network quality, reach, or service use.
What can an ASN page answer?
An ASN page shows the public organization label, country or region, BGP prefixes, and available peer and upstream relationships. It adds network context but cannot confirm a website host, physical facility, security status, or service quality.
How should you read the organization and region fields?
CENTURYLINK-LEGACY-SAVVIS - CenturyLink Communications, LLC is currently associated with an unknown region. These values come from public network sources and are useful lookup clues; an organization label, registration region, and actual service location may differ.
How should you verify the AS3561 result?
The page shows ASN data returned by the current upstream query; interpret it with the update time. Open representative IP pages from the same network and compare prefixes, source labels, and query times. Verify operator or service claims with the relevant registry or network operator.
How to verify this ASN result
AS3561 ASN lookupAS3561 BGPAS3561 peersAS3561 prefixesAS3561 upstreamsCENTURYLINK-LEGACY-SAVVIS - CenturyLink Communications, LLC ASN
Upstreams
Detailed data for this ASN is not available right now.
Downstreams
AS21622
AS21622
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AS22064
AS22064
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AS32988
AS32988
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AS29457
AS29457
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AS62827
AS62827
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AS63427
AS63427
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AS40026
AS40026
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AS10959
AS10959
—
AS14524
AS14524
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AS19701
AS19701
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AS46263
AS46263
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AS20391
AS20391
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AS62520
AS62520
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AS201493
AS201493
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AS40946
AS40946
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AS64212
AS64212
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AS396167
AS396167
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AS393738
AS393738
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AS15349
AS15349
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AS23147
AS23147
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AS46885
AS46885
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AS6989
AS6989
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AS39965
AS39965
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AS53687
AS53687
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AS26158
AS26158
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AS36539
AS36539
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AS394463
AS394463
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AS14688
AS14688
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AS394792
AS394792
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AS393697
AS393697
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AS13458
AS13458
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AS22283
AS22283
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AS54645
AS54645
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AS40685
AS40685
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AS46269
AS46269
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AS54262
AS54262
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AS40695
AS40695
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AS7761
AS7761
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AS13494
AS13494
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AS393888
AS393888
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Peers
Prefix inventory
| Prefix | Name | Country |
|---|---|---|
| 100.42.20.0/24 | AS3561 | — |
| 100.42.21.0/24 | AS3561 | — |
| 100.42.23.0/24 | AS3561 | — |
| 103.11.68.0/22 | AS3561 | — |
| 104.164.158.0/24 | AS3561 | — |
| 104.252.0.0/24 | AS3561 | — |
| 104.252.124.0/24 | AS3561 | — |
| 104.252.143.0/24 | AS3561 | — |
| 104.252.147.0/24 | AS3561 | — |
| 104.252.158.0/24 | AS3561 | — |
| 104.252.203.0/24 | AS3561 | — |
| 104.252.235.0/24 | AS3561 | — |
| 104.252.244.0/24 | AS3561 | — |
| 104.252.55.0/24 | AS3561 | — |
| 104.252.60.0/24 | AS3561 | — |
| 104.252.66.0/24 | AS3561 | — |
| 104.252.96.0/24 | AS3561 | — |
| 104.253.122.0/24 | AS3561 | — |
| 104.253.173.0/24 | AS3561 | — |
| 104.253.2.0/24 | AS3561 | — |
| 104.253.49.0/24 | AS3561 | — |
| 104.253.53.0/24 | AS3561 | — |
| 104.253.61.0/24 | AS3561 | — |
| 104.253.8.0/24 | AS3561 | — |
| 104.253.9.0/24 | AS3561 | — |
| 104.253.99.0/24 | AS3561 | — |
| 109.166.40.0/21 | AS3561 | — |
| 109.166.48.0/21 | AS3561 | — |
| 130.193.3.0/24 | AS3561 | — |
| 136.0.239.0/24 | AS3561 | — |
| 140.228.18.0/24 | AS3561 | — |
| 140.228.19.0/24 | AS3561 | — |
| 141.140.10.0/24 | AS3561 | — |
| 141.140.11.0/24 | AS3561 | — |
| 141.140.8.0/24 | AS3561 | — |
| 141.140.9.0/24 | AS3561 | — |
| 142.111.153.0/24 | AS3561 | — |
| 142.111.186.0/24 | AS3561 | — |
| 142.111.197.0/24 | AS3561 | — |
| 142.111.222.0/24 | AS3561 | — |
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Related lookups and next steps
Frequently asked questions about this ASN page
What does AS3561 represent?
AS3561 is an autonomous system number. The current source associates it with CENTURYLINK-LEGACY-SAVVIS - CenturyLink Communications, LLC and the region field an unknown region; those values add network context but do not prove a specific service, physical location, or quality level.
What are peers, upstreams, and prefixes useful for on the AS3561 page?
They help explain the scale, interconnection depth, and route structure of AS3561. 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 AS3561?
Open a concrete IP page to check how the address maps into AS3561, then compare the prefix, source labels, and query time. Verify operator or service claims with the relevant registry or network operator.
Related topics
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