Autonomous System
AS21273 — TEST-AS-CUST(CH)
Last fetched
AS21273 is an Autonomous System operated by TEST-AS-CUST and registered in CH. As of Thu, 21 May 2026 12:49:44 GMT, it announces 4 routed IP prefixes and peers with 2 other Autonomous Systems in the WhisperGraph BGP dataset.
Nutrition Label
Routing footprint
AS21273 announces 4 distinct routed prefixes. The 4-prefix sample below links to per-prefix pages with full conflict and reverse-DNS detail.
Peering ecosystem
2 distinct peers via BGP. The first 2 are listed below.
MOAS / hijack watch
Prefixes routed by AS21273 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 AS21273 is unique to AS21273 in the current routing snapshot.
Threat posture
Related pages
Pivot deeper into the graph from AS21273.
Cypher and MCP
Reproduce the headline metric directly against graph.whisper.security:
MATCH (a:ASN {name: "AS21273"})-[: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.