AS3561 — CENTURYLINK-LEGACY-SAVVIS

Network type: hosting

AS3561 announces 1,145 IPv4 prefixes covering 6,374,656 addresses and 1 IPv6 prefixes.

About this network

A large legacy US backbone Autonomous System (CENTURYLINK-LEGACY-SAVVIS), now part of Lumen Technologies via CenturyLink's acquisition of Savvis. Savvis was a major managed-hosting and IP-network operator; this ASN carries that inherited transit and hosting infrastructure.

What it's used for

• Long-haul IP transit and enterprise connectivity, plus legacy managed hosting and data-center customers absorbed from Savvis.

Notable

• Primarily a carrier/backbone ASN, so addresses here are often transit or enterprise circuits rather than retail VPS.
• Part of the broader Lumen/CenturyLink/Level 3 network family, which spans many ASNs from decades of mergers.

Interesting

• Savvis was one of the early managed-hosting and colocation heavyweights before CenturyLink (now Lumen) acquired it in 2011.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 5.157.164.0/22
• 23.26.66.0/24
• 23.26.136.0/24
• 23.26.202.0/24
• 23.27.55.0/24
• 23.27.115.0/24
• 23.27.130.0/24
• 23.230.194.0/24
• 23.230.243.0/24
• 45.38.5.0/24
• 45.38.28.0/24
• 45.38.49.0/24
• 45.38.61.0/24
• 45.38.66.0/24
• 45.38.71.0/24
• 45.38.108.0/24
• 45.38.144.0/24
• 45.38.147.0/24
• 45.38.172.0/24
• 45.38.247.0/24
• 45.38.250.0/24
• 45.39.54.0/24
• 45.39.61.0/24
• 45.39.68.0/24
• 45.39.88.0/23
• 45.39.97.0/24
• 45.39.133.0/24
• 45.39.160.0/24
• 45.39.177.0/24
• 45.39.193.0/24
• 50.114.32.0/24
• 50.114.165.0/24
• 50.114.173.0/24
• 50.114.210.0/24
• 50.117.28.0/24
• 50.117.44.0/24
• 50.117.73.0/24
• 50.117.97.0/24
• 50.117.100.0/24
• 50.117.105.0/24
• 50.118.215.0/24
• 62.216.64.0/21
• 63.128.4.0/23
• 63.128.6.0/24
• 63.128.13.0/24
• 63.128.15.0/24
• 63.128.16.0/22
• 63.128.22.0/23
• 63.128.25.0/24
• 63.128.26.0/23
• 63.128.28.0/22
• 63.128.32.0/23
• 63.128.36.0/22
• 63.128.40.0/21
• 63.128.48.0/20
• 63.128.64.0/19
• 63.128.96.0/22
• 63.128.100.0/23
• 63.128.104.0/21
• 63.128.112.0/20
• 63.128.128.0/23
• 63.128.131.0/24
• 63.128.132.0/22
• 63.128.136.0/21
• 63.128.144.0/20
• 63.128.160.0/21
• 63.128.168.0/23
• 63.128.171.0/24
• 63.128.172.0/22
• 63.128.176.0/20
• 63.128.192.0/18
• 63.136.0.0/18
• 63.136.64.0/19
• 63.136.96.0/20
• 63.136.120.0/21
• 63.136.128.0/17
• 63.137.0.0/18
• 63.137.64.0/21
• 63.137.72.0/22
• 63.137.76.0/24
• 63.137.78.0/23
• 63.137.80.0/20
• 63.137.96.0/20
• 63.137.112.0/22
• 63.137.116.0/23
• 63.137.119.0/24
• 63.137.120.0/21
• 63.137.128.0/18
• 63.137.192.0/19
• 63.137.224.0/22
• 63.137.228.0/24
• 63.137.230.0/23
• 63.137.232.0/21
• 63.137.240.0/20
• 63.146.199.0/24
• 63.235.144.0/24
• 64.14.0.0/20
• 64.14.16.0/23
• 64.14.18.0/24
• 64.14.20.0/22

and 1,046 more.

Upstream networks

• AS3356 Level 3 Parent, LLC
• AS58057 Securebit AG
• AS209 CenturyLink Communications, LLC
• AS3910 CenturyLink Communications, LLC

Downstream networks

• AS6989 Government Technology Services Inc.
• AS21622 PR Newswire
• AS14524 SERCO NA
• AS19701 Yodlee Inc.
• AS63427 Computer Design & Integration LLC
• AS46263 e-Dialog, Inc
• AS22064 Refinitiv US LLC
• AS64212 Advantage Sales & Marketing LLC
• AS32988 Analog Devices, Inc.
• AS40026 DICK'S SPORTING GOODS INC
• AS10959 Bank of America, National Association
• AS29457 Options Technology Ltd
• AS396167 Blackhawk Network, Inc.
• AS62520 eMASON, Inc
• AS36539 Peak6 Group LLC
• AS15349 Guggenheim Services LLC
• AS201493 ALVARIA TECHNOLOGIES UK LIMITED
• AS20391 The Parking Spot
• AS46885 Carlyle Investment Management L.L.C.
• AS39965 RADIANT-GLOBAL
• AS23147 Byline Bank
• AS53687 DataComm Networks Inc.
• AS26158 ULTIMATE SOFTWARE GROUP
• AS394463 Veros Software
• AS14688 GlobalView Software Inc.

Adjacent networks

• AS3356 Level 3 Parent, LLC
• AS6989 Government Technology Services Inc.
• AS58057 Securebit AG
• AS21622 PR Newswire
• AS14524 SERCO NA
• AS19701 Yodlee Inc.
• AS209 CenturyLink Communications, LLC
• AS3910 CenturyLink Communications, LLC
• AS63427 Computer Design & Integration LLC
• AS46263 e-Dialog, Inc
• AS40026 DICK'S SPORTING GOODS INC
• AS22064 Refinitiv US LLC
• AS64212 Advantage Sales & Marketing LLC
• AS32988 Analog Devices, Inc.
• AS10959 Bank of America, National Association
• AS29457 Options Technology Ltd
• AS396167 Blackhawk Network, Inc.
• AS46885 Carlyle Investment Management L.L.C.
• AS62520 eMASON, Inc
• AS20391 The Parking Spot
• AS15349 Guggenheim Services LLC
• AS36539 Peak6 Group LLC
• AS201493 ALVARIA TECHNOLOGIES UK LIMITED
• AS39965 RADIANT-GLOBAL
• AS53687 DataComm Networks Inc.

Internet exchanges

• DE-CIX Frankfurt — Frankfurt, Germany