Autonomous system
AS6224 CENTURYLINK-MTIPS2-CHI
Unclassified ARIN
Summary
CenturyLink MTIPS (Trusted Internet Connection gateway, Chicago)
government enterprise legacy
CENTURYLINK-MTIPS2-CHI is the second of CenturyLink's (now Lumen's) MTIPS autonomous systems — Managed Trusted Internet Protocol Service, the GSA-contract gateway through which US federal agencies reach the public internet in compliance with the Trusted Internet Connection (TIC) initiative. The CHI suffix marks the Chicago portal; its companion is AS6223.
What it's used for
- Providing a monitored, TIC-compliant internet gateway for federal civilian agency traffic, sold under the GSA Networx and EIS contracts.
- Announces just a single
/24— 256 IPv4 addresses.
Notable
- The operator is a commercial carrier but the purpose is governmental: this space exists to front federal agency connections, not to serve CenturyLink customers in the ordinary sense.
- A
/24behind its own AS number is a deliberate, security-driven design — a small, clearly delimited perimeter is the point of a TIC access portal.
Interesting
- MTIPS gateways are geographically paired for resilience, which is why CenturyLink registered two adjacent AS numbers for the service rather than running both sites in one routing domain.
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
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Transit providers
1 upstream, 3 downstream and 7 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS209 | CenturyLink Communications, LLC | 60 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-23, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 256 addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 1 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS6224- Registry name
- CENTURYLINK-MTIPS2-CHI
- Registrant
- CenturyLink Communications, LLC
- Abuse contact
- abuse@aup.lumen.com
- Registered
- 1996-01-25
- Last changed
- 2020-10-20
- Allocation
- assigned
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 1 with no ROA
- ROAs
- 0 authorising AS6224
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 1 announcements
- Route objects
- 0 naming AS6224
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
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 1,779 prefixes, as published 2026-10-24. 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