Autonomous System
AS21234 — GRENKE - GRENKE Service GmbH(DE)
Last fetched
AS21234 is an Autonomous System operated by GRENKE - GRENKE Service GmbH and registered in DE. As of Sun, 06 Sep 2026 13:08:08 GMT, it announces 3 routed IP prefixes and peers with 2 other Autonomous Systems in the WhisperGraph BGP dataset.
Nutrition Label
Routing footprint
AS21234 announces 3 distinct routed prefixes. The 3-prefix sample below links to per-prefix pages with full conflict and reverse-DNS detail.
Peering ecosystem
2 distinct peers via BGP. The first 2 are listed below.
Blast radius
Count of dependent hostnames if AS21234 disappeared from the routing table.
477 hostnames depend on this network.Exact count across all 2 announced prefixes. Snapshot Mon, 06 Jul 2026 01:00:24 GMT.
MOAS / hijack watch
Prefixes routed by AS21234 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 AS21234 is unique to AS21234 in the current routing snapshot.
Threat posture
Related pages
Pivot deeper into the graph from AS21234.
Cypher and MCP
Reproduce the headline metric directly against graph.whisper.security:
MATCH (a:ASN {name: "AS21234"})-[: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.