Autonomous system
AS4323 CENTURYLINK-LEGACY-TWTC
Hosting ARIN
Summary
Lumen (CenturyLink / Level 3, legacy Time Warner Telecom)
backbone transit datacenter
A legacy Autonomous System now under Lumen Technologies (via CenturyLink and Level 3), historically the TWTC Time Warner Telecom network. Primarily a large US enterprise backbone and transit network that also underpins Lumen's colocation and edge services.
What it's used for
- Enterprise connectivity, IP transit, and hosting/colocation for business customers on Lumen's network.
Notable
- More of a carrier/backbone AS than a pure hosting host; addresses here are often business circuits rather than VPS.
- Part of a sprawling Lumen/CenturyLink/Level 3 AS family assembled through decades of telecom mergers (Level 3, Qwest, TWTC, and others).
Interesting
- Time Warner Telecom (TWTC) was a US competitive carrier absorbed into tw telecom, then Level 3, then CenturyLink, and finally rebranded as Lumen.
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 2 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| New York International Internet Exchange | New York, United States | 198.32.160.35 |
| Equinix Internet Exchange Palo Alto | Palo Alto, United States | 198.32.176.111 |
Transit providers
No transit provider observed. 5 downstream and 6 adjacent networks.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 0 prefixes · 0 addresses IPv6 0 prefixes
This network announces no prefixes we can see.
Registry
Allocation record
- Registry
- ARIN
- Handle
AS4323- Registry name
- CENTURYLINK-LEGACY-TWTC
- Registrant
- Level 3 Parent, LLC
- Abuse contact
- abuse@level3.com
- Registered
- 1995-02-01
- Last changed
- 2022-03-23
- Allocation
- assigned
Routing security
RPKI and IRR
- ROAs
- 2 authorising AS4323
- ASPA
- no ASPA record
- Route objects
- 2 naming AS4323
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: 440 networks and 1,773 prefixes, as published 2026-10-13. 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