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Autonomous System

AS21520

Last fetched

AS21520 is an Autonomous System. Live infrastructure data is temporarily unavailable; refresh in a moment.

Nutrition Label

WHISPER CANON · AS21520Routing diversity—Peering density—MOAS conflict—Threat-feed listings—WHOIS transparency—Resolver footprint—canon.whisper.security/asn/21520

Routing footprint

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Peering ecosystem

Peering data is temporarily unavailable. Refresh in a moment to retry.

Blast radius

Count of dependent hostnames if AS21520 disappeared from the routing table.

525 hostnames depend on this network.Exact count across all 23 announced prefixes. Snapshot Thu, 09 Jul 2026 05:01:07 GMT.

MOAS / hijack watch

Prefixes routed by AS21520 that another Autonomous System also announces. A non-empty list is one of the strongest BGP-hijack signals available without active probes.

MOAS conflict data is temporarily unavailable. Refresh in a moment to retry.

Threat posture

Related pages

Pivot deeper into the graph from AS21520.

Cypher and MCP

Reproduce the headline metric directly against graph.whisper.security:

MATCH (a:ASN {name: "AS21520"})-[:HAS_NAME]->(n:ASN_NAME)
OPTIONAL MATCH (a)-[:HAS_COUNTRY]->(c:COUNTRY)
RETURN a.name AS asn, n.name AS operator, c.name AS country

Or query Whisper from your own LLM workflow via the Whisper MCP server.