Autonomous System
AS21737 — SPRINGNET2-NET - SpringNet(US)
Last fetched
AS21737 is an Autonomous System operated by SPRINGNET2-NET - SpringNet and registered in US. As of Fri, 04 Sep 2026 00:53:16 GMT, it announces 11 routed IP prefixes and peers with 11 other Autonomous Systems in the WhisperGraph BGP dataset.
Nutrition Label
Routing footprint
AS21737 announces 11 distinct routed prefixes. The 11-prefix sample below links to per-prefix pages with full conflict and reverse-DNS detail.
Peering ecosystem
11 distinct peers via BGP. The first 11 are listed below.
| Peer ASN | Operator | Country |
|---|---|---|
| AS11826 | RISS2 - Regional Information Sharing Systems | US |
| AS1299 | TWELVE99 - Arelion Sweden AB | SE |
| AS174 | COGENT-174 - Cogent Communications, LLC | US |
| AS20296 | EXPEDIA-ARIN - EXPEDIA, INC | US |
| AS21835 | SCARSDALE-SECURITY-SYSTEMS - Scarsdale Security Systems, Inc. | US |
| AS30628 | SRC-AUTOMOTIVE-INC - SRC Automotive Inc. | US |
| AS33252 | BASSPRO-AS - Bass Pro, LLC. | US |
| AS3356 | LEVEL3 - Level 3 Parent, LLC | US |
| AS34927 | iFog-GmbH - iFog GmbH | CH |
| AS393977 | GSB - Great Southern Bank | US |
| AS63051 | CRITICALHOSTING-USA - Critical Hosting Solutions LLC | US |
Blast radius
Count of dependent hostnames if AS21737 disappeared from the routing table.
1,551 hostnames depend on this network.Exact count across all 11 announced prefixes. Snapshot Fri, 10 Jul 2026 04:01:10 GMT.
MOAS / hijack watch
Prefixes routed by AS21737 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 AS21737 is unique to AS21737 in the current routing snapshot.
Threat posture
Related pages
Pivot deeper into the graph from AS21737.
Cypher and MCP
Reproduce the headline metric directly against graph.whisper.security:
MATCH (a:ASN {name: "AS21737"})-[: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.