Autonomous System
AS21056 — ASN-WELCOMEITALIA - Vianova S.p.A(IT)
Last fetched
AS21056 is an Autonomous System operated by ASN-WELCOMEITALIA - Vianova S.p.A and registered in IT. As of Tue, 04 Aug 2026 04:14:34 GMT, it announces 43 routed IP prefixes and peers with 18 other Autonomous Systems in the WhisperGraph BGP dataset.
Nutrition Label
Routing footprint
AS21056 announces 43 distinct routed prefixes. The 25-prefix sample below links to per-prefix pages with full conflict and reverse-DNS detail.
- 45.84.140.0/22
- 45.143.36.0/22
- 45.151.12.0/22
- 45.151.64.0/22
- 46.44.192.0/18
- 78.152.96.0/19
- 79.108.136.0/21
- 79.135.32.0/19
- 80.93.128.0/20
- 80.93.143.0/24
- 83.137.56.0/21
- 87.247.232.0/21
- 87.247.239.0/24
- 91.143.192.0/20
- 91.201.104.0/24
- 91.242.230.0/24
- 94.138.160.0/19
- 103.26.124.0/22
- 103.43.232.0/22
- 103.61.184.0/22
- 103.248.184.0/22
- 109.122.208.0/21
- 144.48.192.0/22
- 185.97.216.0/24
- 185.97.217.0/24
Peering ecosystem
18 distinct peers via BGP. The first 18 are listed below.
| Peer ASN | Operator | Country |
|---|---|---|
| AS1299 | TWELVE99 - Arelion Sweden AB | SE |
| AS17639 | CONVERGE-AS - Converge ICT Solutions Inc. | PH |
| AS1764 | NEXTLAYER-AS - Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH | AT |
| AS1836 | GREEN - green.ch AG | CH |
| AS198320 | TELNETSYSTEMS - Telnet Systems s.r.l. | IT |
| AS208775 | comacspait - COMAC S.P.A. | IT |
| AS210224 | SNAPSYS-AS - SNAP SYSTEM SRL | IT |
| AS212024 | RISSON - Marc Schmitt | FR |
| AS29632 | NASSIST-AS - Netassist International EOOD | BG |
| AS3356 | LEVEL3 - Level 3 Parent, LLC | US |
| AS34549 | MEER-AS - meerfarbig GmbH & Co. KG | DE |
| AS47242 | HOST-SPA - Host SpA | IT |
| AS48362 | TKSWF-AS - Stadtwerke Feldkirch | AT |
| AS56662 | EUTPNET - Marcin Gondek | PL |
| AS6762 | SEABONE-NET - TELECOM ITALIA SPARKLE S.p.A. | IT |
| AS6939 | HURRICANE - Hurricane Electric LLC | US |
| AS8966 | Etisalat-AS - EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC | AE |
| AS9002 | RETN-AS - RETN Limited | GB |
Blast radius
Count of dependent hostnames if AS21056 disappeared from the routing table.
12,047 hostnames depend on this network.Exact count across all 44 announced prefixes. Snapshot Sun, 05 Jul 2026 06:00:36 GMT.
MOAS / hijack watch
Prefixes routed by AS21056 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 AS21056 is unique to AS21056 in the current routing snapshot.
Threat posture
Related pages
Pivot deeper into the graph from AS21056.
Cypher and MCP
Reproduce the headline metric directly against graph.whisper.security:
MATCH (a:ASN {name: "AS21056"})-[: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.