$ query “AS21056” --type=asn → 1 result(s)

AS21056 · ASN-WELCOMEITALIA

Vianova S.p.A

AS21056 is operated by Vianova S.p.A and serves as a residential access provider, registered in Italy since 2002. The system announces a respectable 88 576 IPv4 addresses, and supports IPv6. Most of its address space is geolocated to Italy, with additional presence in Unknown Region.

  • Top 5% — Top 5% of all autonomous systems by reach and degree

Basic Information

Country
🇮🇹 Italy
Category
Internet Service Provider
Network Role
Access Provider
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
May 02, 2002
Last Changed
March 04, 2026
Last Seen
April 29, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
42 / 36
IPv6 Prefixes (raw / aggregated)
1 / 1
IPv4 Addresses
88 576
Largest IPv4 Prefix
/18 (16 384 addresses)
Largest IPv6 Prefix
/32
Geolocated Countries
🇮🇹 Italy (163 840 IPs), 🇿🇿 Unknown Region (10 240 IPs)
Prefix Changed
March 22, 2026

Reputation

Reputation
Good — 1 flagged IPs out of 88 576 total (0.00%)

Connectivity Summary

Upstream Providers
3 upstreams providing transit
Peers
197 networks exchanging traffic without transit
Downstream Customers
4 downstreams buying transit
Unclassified
3 unclassified BGP neighbors
Degree
207 unique BGP neighbors
Reach
11 networks in customer cone

Upstream Providers (3)

  • AS3356 — LEVEL3 (Tier-1 transit)
  • AS1299 — TWELVE99 (Tier-1 transit)
  • AS6762 — SEABONE-NET (Tier-1 transit)

Prefix Lists

IPv4 Prefixes (42 total)

  • 46.44.192.0/18 (16 384 addresses (/18 prefix))
  • 213.182.64.0/19 (8 192 addresses (/19 prefix))
  • 94.138.160.0/19 (8 192 addresses (/19 prefix))
  • 78.152.96.0/19 (8 192 addresses (/19 prefix))
  • 79.135.32.0/19 (8 192 addresses (/19 prefix))
  • 80.93.128.0/20 (4 096 addresses (/20 prefix))
  • 91.143.192.0/20 (4 096 addresses (/20 prefix))
  • 109.122.208.0/21 (2 048 addresses (/21 prefix))
  • 83.137.56.0/21 (2 048 addresses (/21 prefix))
  • 87.247.232.0/21 (2 048 addresses (/21 prefix))
  • 185.158.116.0/22 (1 024 addresses (/22 prefix))
  • 188.240.32.0/22 (1 024 addresses (/22 prefix))
  • 45.143.36.0/22 (1 024 addresses (/22 prefix))
  • 45.151.12.0/22 (1 024 addresses (/22 prefix))
  • 103.26.124.0/22 (1 024 addresses (/22 prefix))
  • 103.43.232.0/22 (1 024 addresses (/22 prefix))
  • 103.61.184.0/22 (1 024 addresses (/22 prefix))
  • 103.248.184.0/22 (1 024 addresses (/22 prefix))
  • 45.84.140.0/22 (1 024 addresses (/22 prefix))
  • 144.48.192.0/22 (1 024 addresses (/22 prefix))
  • 185.97.216.0/22 (1 024 addresses (/22 prefix))
  • 185.125.64.0/22 (1 024 addresses (/22 prefix))
  • 194.58.216.0/22 (1 024 addresses (/22 prefix))
  • 45.151.64.0/22 (1 024 addresses (/22 prefix))
  • 185.230.232.0/22 (1 024 addresses (/22 prefix))
  • 185.224.104.0/22 (1 024 addresses (/22 prefix))
  • 185.230.92.0/22 (1 024 addresses (/22 prefix))
  • 185.230.192.0/22 (1 024 addresses (/22 prefix))
  • 185.224.60.0/22 (1 024 addresses (/22 prefix))
  • 185.231.160.0/22 (1 024 addresses (/22 prefix))
  • 185.234.164.0/22 (1 024 addresses (/22 prefix))
  • 185.241.20.0/22 (1 024 addresses (/22 prefix))
  • 185.170.36.0/22 (1 024 addresses (/22 prefix))
  • 193.124.240.0/22 (1 024 addresses (/22 prefix))
  • 91.201.104.0/24 (256 addresses (/24 prefix))
  • 91.242.230.0/24 (256 addresses (/24 prefix))

IPv6 Prefixes (1 total)

  • 2a00:14f8::/32