Autonomous System
AS203 — CENTURYLINK-LEGACY-LVLT-203 - Level 3 Parent, LLC(US)
Last fetched
AS203 is an Autonomous System operated by CENTURYLINK-LEGACY-LVLT-203 - Level 3 Parent, LLC and registered in US. As of Wed, 20 May 2026 21:51:54 GMT, it announces 173 routed IP prefixes and peers with 1 other Autonomous System in the WhisperGraph BGP dataset.
Nutrition Label
Routing footprint
AS203 announces 173 distinct routed prefixes. The 25-prefix sample below links to per-prefix pages with full conflict and reverse-DNS detail.
- 4.55.52.0/24
- 4.55.68.0/24
- 5.0.160.0/21
- 5.0.168.0/21
- 5.1.2.0/24
- 5.1.3.0/24
- 5.1.4.0/22
- 5.1.8.0/22
- 5.1.43.0/24
- 8.18.11.0/24
- 8.21.220.0/23
- 8.23.192.0/23
- 8.25.240.0/21
- 8.29.66.0/24
- 8.40.171.0/24
- 8.137.0.0/16
- 38.117.213.0/24
- 62.108.72.0/24
- 62.108.73.0/24
- 63.218.188.0/23
- 63.223.19.0/24
- 63.223.20.0/24
- 63.223.22.0/24
- 63.223.24.0/24
- 63.223.25.0/24
Peering ecosystem
1 distinct peers via BGP. The first 1 are listed below.
| Peer ASN | Operator | Country |
|---|---|---|
| AS3356 | LEVEL3 - Level 3 Parent, LLC | US |
Blast radius
Approximate count of dependent hostnames if AS203 disappeared from the routing table.
~590,587 hostnames depend on this network.Sampled from 10 prefixes, snapshot Wed, 20 May 2026 21:51:54 GMT.
MOAS / hijack watch
Prefixes routed by AS203 that another Autonomous System also announces. A non-empty list is one of the strongest BGP-hijack signals available without active probes.
No active MOAS conflicts. Every prefix announced by AS203 is unique to AS203 in the current routing snapshot.
Threat posture
Related pages
Pivot deeper into the graph from AS203.
Cypher and MCP
Reproduce the headline metric directly against graph.whisper.security:
MATCH (a:ASN {name: "AS203"})-[:HAS_NAME]->(n:ASN_NAME)
OPTIONAL MATCH (a)-[:HAS_COUNTRY]->(c:COUNTRY)
RETURN a.name AS asn, n.name AS operator, c.name AS countryOr query Whisper from your own LLM workflow via the Whisper MCP server.