Autonomous System
AS4891 — PORTO-18-4891 - Port of Houston Authority of Harris County, Texas(US)
Last fetched
AS4891 is an Autonomous System operated by PORTO-18-4891 - Port of Houston Authority of Harris County, Texas and registered in US. As of Wed, 20 May 2026 21:54:38 GMT, it announces 1 routed IP prefix and peers with 1 other Autonomous System in the WhisperGraph BGP dataset.
Nutrition Label
Routing footprint
AS4891 announces 1 distinct routed prefix. The 1-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 |
|---|---|---|
| AS13767 | DATABANK-DFW - DataBank Holdings, Ltd. | US |
Blast radius
Approximate count of dependent hostnames if AS4891 disappeared from the routing table.
No dependent hostnames recorded for this network.Snapshot Wed, 20 May 2026 21:54:38 GMT.
MOAS / hijack watch
Prefixes routed by AS4891 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 AS4891 is unique to AS4891 in the current routing snapshot.
Threat posture
Related pages
Pivot deeper into the graph from AS4891.
Cypher and MCP
Reproduce the headline metric directly against graph.whisper.security:
MATCH (a:ASN {name: "AS4891"})-[: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.