Autonomous System
AS4021 — ASN-4020-1 - Air Force Systems Networking(US)
Last fetched
AS4021 is an Autonomous System operated by ASN-4020-1 - Air Force Systems Networking and registered in US. As of Thu, 21 May 2026 06:25:16 GMT, it announces 0 routed IP prefixes and peers with 0 other Autonomous Systems in the WhisperGraph BGP dataset.
Nutrition Label
Routing footprint
AS4021 announces 0 distinct routed prefixes. The 0-prefix sample below links to per-prefix pages with full conflict and reverse-DNS detail.
AS4021 does not announce any prefixes in the current snapshot.
Peering ecosystem
0 distinct peers via BGP. The first 0 are listed below.
AS4021 has no observed peering relationships in the current snapshot.
MOAS / hijack watch
Prefixes routed by AS4021 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 AS4021 is unique to AS4021 in the current routing snapshot.
Threat posture
Related pages
Pivot deeper into the graph from AS4021.
Cypher and MCP
Reproduce the headline metric directly against graph.whisper.security:
MATCH (a:ASN {name: "AS4021"})-[: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.