Autonomous System
AS4 — ISI-AS - University of Southern California(US)
Last fetched
AS4 is an Autonomous System operated by ISI-AS - University of Southern California and registered in US. As of Mon, 27 Jul 2026 14:30:12 GMT, it announces 53 routed IP prefixes and peers with 12 other Autonomous Systems in the WhisperGraph BGP dataset.
Nutrition Label
Routing footprint
AS4 announces 53 distinct routed prefixes. The 25-prefix sample below links to per-prefix pages with full conflict and reverse-DNS detail.
- 45.228.73.0/24
- 45.228.74.0/24
- 45.228.75.0/24
- 128.9.0.0/20
- 128.9.16.0/24
- 128.9.17.0/24
- 128.9.18.0/24
- 128.9.19.0/24
- 128.9.26.0/24
- 128.9.28.0/23
- 128.9.30.0/24
- 128.9.31.0/24
- 128.9.34.0/24
- 128.9.35.0/24
- 128.9.36.0/24
- 128.9.37.0/24
- 128.9.38.0/24
- 128.9.32.0/20
- 128.9.40.0/24
- 128.9.43.0/24
- 128.9.44.0/24
- 128.9.46.0/24
- 128.9.47.0/24
- 128.9.48.0/20
- 128.9.64.0/20
Peering ecosystem
12 distinct peers via BGP. The first 12 are listed below.
| Peer ASN | Operator | Country |
|---|---|---|
| AS10886 | MAX-GIGAPOP - University of Maryland | US |
| AS174 | COGENT-174 - Cogent Communications, LLC | US |
| AS226 | LOS-NETTOS-AS - Los Nettos | US |
| AS2635 | AUTOMATTIC - Automattic, Inc | US |
| AS266306 | — | BR |
| AS266674 | — | AR |
| AS30844 | — | GB |
| AS327707 | — | RW |
| AS329184 | — | ZA |
| AS37358 | — | ZA |
| AS400215 | SAMBANOVA - Sambanova Systems, Inc. | US |
| AS567 | ASN-LNET-AS - Los Nettos | US |
Blast radius
Count of dependent hostnames if AS4 disappeared from the routing table.
Blast radius: Computing — check back later. The precompute pipeline refreshes this panel within a few days.
MOAS / hijack watch
Prefixes routed by AS4 that another Autonomous System also announces. A non-empty list is one of the strongest BGP-hijack signals available without active probes.
| Prefix | Conflicting ASN | Operator |
|---|---|---|
| 165.140.12.0/24 | AS400215 | SAMBANOVA - Sambanova Systems, Inc. |
| 165.140.13.0/24 | AS400215 | SAMBANOVA - Sambanova Systems, Inc. |
| 165.140.14.0/24 | AS400215 | SAMBANOVA - Sambanova Systems, Inc. |
Threat posture
Related pages
Pivot deeper into the graph from AS4.
Cypher and MCP
Reproduce the headline metric directly against graph.whisper.security:
MATCH (a:ASN {name: "AS4"})-[:HAS_NAME]->(n:ASN_NAME)
OPTIONAL MATCH (a)-[:HAS_COUNTRY]->(c:COUNTRY)
RETURN a.name AS asn, n.name AS operator, c.name AS countryOr query Whisper from your own LLM workflow via the Whisper MCP server.