Autonomous System

AS21843 — CITY-OF-BUFFALO - City of Buffalo(US)

Last fetched Thu, 21 May 2026 06:23:16 GMT

AS21843 is an Autonomous System operated by CITY-OF-BUFFALO - City of Buffalo and registered in US. As of Thu, 21 May 2026 06:23:16 GMT, it announces 2 routed IP prefixes and peers with 1 other Autonomous System in the WhisperGraph BGP dataset.

Nutrition Label

Routing footprint

AS21843 announces 2 distinct routed prefixes. The 2-prefix sample below links to per-prefix pages with full conflict and reverse-DNS detail.

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 AS21843 disappeared from the routing table.

~1,818 hostnames depend on this network.Sampled from 10 prefixes, snapshot Thu, 21 May 2026 06:23:16 GMT.

MOAS / hijack watch

Prefixes routed by AS21843 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 AS21843 is unique to AS21843 in the current routing snapshot.

Threat posture

Pivot deeper into the graph from AS21843.

Cypher and MCP

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

MATCH (a:ASN {name: "AS21843"})-[: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.