AS6223 — CENTURYLINK-MTIPS1-STN
AS6223 announces 3 IPv4 prefixes covering 2,560 addresses and 2 IPv6 prefixes.
About this network
CENTURYLINK-MTIPS1-STN is one of CenturyLink's (now Lumen's) MTIPS autonomous systems — Managed Trusted Internet Protocol Service, the GSA-contract service that gives US federal agencies a compliant, monitored gateway to the public internet. Its companion is AS6224.
What it's used for
- Fronting federal civilian agencies' internet connections through a Trusted Internet Connection (TIC) portal, as required by the OMB TIC initiative and sold under the GSA Networx and EIS contracts.
- Announces a small footprint — a handful of IPv4 prefixes plus IPv6.
Notable
- Although the ASN belongs to a commercial carrier, the traffic is government: reverse DNS in the space resolves to federal .gov agency endpoints. An address here is best read as a US federal agency behind a managed security gateway, not as CenturyLink's own network.
- MTIPS is a security service, so the space is intentionally small and concentrated. It is not transit, hosting or consumer broadband.
Interesting
- The number is registered to the same CenturyLink organisation as AS6222, which carries former-Embarq consumer DSL. Same holder, entirely different kind of network — a good reminder that a carrier's parent identity tells you very little about what any one of its ASNs actually does.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.
Announced prefixes
- 65.144.124.0/24
- 199.248.197.0/24
- 208.68.144.0/21
- 2602:814:9000::/44
- 2620:0:960::/48
Upstream networks
- AS209 CenturyLink Communications, LLC
Downstream networks
- AS4155 USDA
- AS3930 Federal Energy Regulatory Commission
- AS395700 Executive Office Of The President
- AS102 U.S. National Science Foundation
- AS11724 Comptroller of the Currency
- AS53554 National Credit Union Administration
- AS39983 Pension Benefit Guaranty Corp.
Adjacent networks
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IPv4 Prefixes
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IPv6 Prefixes
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Total Prefixes
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Unique /24s
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⚠ SUSPICIOUS PREFIX ANNOUNCEMENTS DETECTED