Autonomous System

AS19903 — REACHBROADBAND - Reach Broadband LLC(US)

Last fetched Thu, 21 May 2026 01:03:47 GMT

AS19903 is an Autonomous System operated by REACHBROADBAND - Reach Broadband LLC and registered in US. As of Thu, 21 May 2026 01:03:47 GMT, it announces 11 routed IP prefixes and peers with 1 other Autonomous System in the WhisperGraph BGP dataset.

Nutrition Label

Routing footprint

AS19903 announces 11 distinct routed prefixes. The 11-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
AS7459	GRANDECOM-AS1 - Grande Communications Networks, LLC	US

Blast radius

Approximate count of dependent hostnames if AS19903 disappeared from the routing table.

~20 hostnames depend on this network.Sampled from 10 prefixes, snapshot Thu, 21 May 2026 01:03:47 GMT.

MOAS / hijack watch

Prefixes routed by AS19903 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 AS19903 is unique to AS19903 in the current routing snapshot.

Threat posture

Pivot deeper into the graph from AS19903.

Cypher and MCP

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

MATCH (a:ASN {name: "AS19903"})-[: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.