Autonomous System

AS398521 — DNIC-ASBLK-4BYTE - United States Department of Defense DoD(US)

Last fetched Thu, 21 May 2026 05:43:48 GMT

AS398521 is an Autonomous System operated by DNIC-ASBLK-4BYTE - United States Department of Defense DoD and registered in US. As of Thu, 21 May 2026 05:43:48 GMT, it announces 0 routed IP prefixes and peers with 0 other Autonomous Systems in the WhisperGraph BGP dataset.

Nutrition Label

Routing footprint

AS398521 announces 0 distinct routed prefixes. The 0-prefix sample below links to per-prefix pages with full conflict and reverse-DNS detail.

AS398521 does not announce any prefixes in the current snapshot.

Peering ecosystem

0 distinct peers via BGP. The first 0 are listed below.

AS398521 has no observed peering relationships in the current snapshot.

Blast radius

Approximate count of dependent hostnames if AS398521 disappeared from the routing table.

No dependent hostnames recorded for this network.Snapshot Thu, 21 May 2026 05:43:48 GMT.

MOAS / hijack watch

Prefixes routed by AS398521 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 AS398521 is unique to AS398521 in the current routing snapshot.

Threat posture

Pivot deeper into the graph from AS398521.

Cypher and MCP

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

MATCH (a:ASN {name: "AS398521"})-[: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.