Autonomous System
AS19121 — BLATTNER-HOLDING-COMPANY - Blattner Company(US)
Last fetched
AS19121 is an Autonomous System operated by BLATTNER-HOLDING-COMPANY - Blattner Company and registered in US. As of Tue, 01 Sep 2026 23:21:14 GMT, it announces 1 routed IP prefix and peers with 1 other Autonomous System in the WhisperGraph BGP dataset.
Nutrition Label
Routing footprint
AS19121 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 |
|---|---|---|
| AS11232 | MIDCO-NET - Midcontinent Communications | US |
Blast radius
Count of dependent hostnames if AS19121 disappeared from the routing table.
6 hostnames depend on this network.Exact count across all 1 announced prefixes. Snapshot Sat, 13 Jun 2026 19:00:36 GMT.
MOAS / hijack watch
Prefixes routed by AS19121 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 AS19121 is unique to AS19121 in the current routing snapshot.
Threat posture
Related pages
Pivot deeper into the graph from AS19121.
Cypher and MCP
Reproduce the headline metric directly against graph.whisper.security:
MATCH (a:ASN {name: "AS19121"})-[: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.