Autonomous System

AS21801 — MWDSC - Metropolitan Water District of Southern California(US)

Last fetched Wed, 20 May 2026 23:31:33 GMT

AS21801 is an Autonomous System operated by MWDSC - Metropolitan Water District of Southern California and registered in US. As of Wed, 20 May 2026 23:31:33 GMT, it announces 2 routed IP prefixes and peers with 1 other Autonomous System in the WhisperGraph BGP dataset.

Nutrition Label

Routing footprint

AS21801 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
AS40264	AS-MERCED1 - Merced Systems, Inc.	US

Blast radius

Approximate count of dependent hostnames if AS21801 disappeared from the routing table.

~378 hostnames depend on this network.Sampled from 10 prefixes, snapshot Wed, 20 May 2026 23:31:33 GMT.

MOAS / hijack watch

Prefixes routed by AS21801 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 AS21801 is unique to AS21801 in the current routing snapshot.

Threat posture

Pivot deeper into the graph from AS21801.

Cypher and MCP

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

MATCH (a:ASN {name: "AS21801"})-[: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.