Autonomous system
AS3561 CENTURYLINK-LEGACY-SAVVIS
Hosting ARIN
Summary
Lumen / CenturyLink (legacy Savvis)
backbone transit hosting
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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| DE-CIX Frankfurt | Frankfurt, Germany | 80.81.192.128 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1,396 prefixes · 6.39M addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 1,397 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS3561- Registry name
- CENTURYLINK-LEGACY-SAVVIS
- Registrant
- CenturyLink Communications, LLC
- Abuse contact
- abuse@aup.lumen.com
- Registered
- 1998-10-07
- Last changed
- 2018-11-15
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 31% valid · 201 valid, 447 with no ROA
- ROAs
- 270 authorising AS3561
- ASPA
- no ASPA record
- IRR
- 30% registered · 196 of 648 announcements 22 other origin
- Route objects
- 341 naming AS3561
Reputation
Classification and threat
Hosting Datacenter or cloud provider. Addresses are servers, not people.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,771 prefixes, as published 2026-10-15. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere