Autonomous System

AS4357 — PHASE4-RO - Phase IV Systems, Inc.(US)

Last fetched Thu, 21 May 2026 01:03:11 GMT

AS4357 is an Autonomous System operated by PHASE4-RO - Phase IV Systems, Inc. and registered in US. As of Thu, 21 May 2026 01:03:11 GMT, it announces 0 routed IP prefixes and peers with 0 other Autonomous Systems in the WhisperGraph BGP dataset.

Nutrition Label

Routing footprint

AS4357 announces 0 distinct routed prefixes. The 0-prefix sample below links to per-prefix pages with full conflict and reverse-DNS detail.

AS4357 does not announce any prefixes in the current snapshot.

Peering ecosystem

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

AS4357 has no observed peering relationships in the current snapshot.

Blast radius

Approximate count of dependent hostnames if AS4357 disappeared from the routing table.

No dependent hostnames recorded for this network.Snapshot Thu, 21 May 2026 01:03:11 GMT.

MOAS / hijack watch

Prefixes routed by AS4357 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 AS4357 is unique to AS4357 in the current routing snapshot.

Threat posture

Pivot deeper into the graph from AS4357.

Cypher and MCP

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

MATCH (a:ASN {name: "AS4357"})-[: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.