Autonomous System
AS21056 Vianova S.p.A
ISPActiveItalyRIPE
AS21056 (ASN-WELCOMEITALIA) is an ISP network operated by Vianova S.p.A in Italy, registered with RIPE. It has 41 IPv4 prefixes with 90,880 addresses and 1 IPv6 prefix, which makes it the 2,468th largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses90,880in 41 prefixes
IPv6 prefixes1≈ 7.9 × 10²⁸ addresses
Size rank#2,468of 82,200 active ASNs
Details
OrganizationVianova S.p.A
AS nameASN-WELCOMEITALIA
Websitevianova.it
Country Italy (IT)
Network typeISP
RegistryRIPE
Abuse contactipnoc@welcomeitalia.it
Registered2002-05-02
Last updated2025-12-22
IPv4 prefixes
41 prefixes · 90,880 addresses| Network | Addresses | First – last address |
|---|---|---|
| 46.44.192.0/18 | 16,384 | 46.44.192.0 – 46.44.255.255 |
| 78.152.96.0/19 | 8,192 | 78.152.96.0 – 78.152.127.255 |
| 79.135.32.0/19 | 8,192 | 79.135.32.0 – 79.135.63.255 |
| 94.138.160.0/19 | 8,192 | 94.138.160.0 – 94.138.191.255 |
| 213.182.64.0/19 | 8,192 | 213.182.64.0 – 213.182.95.255 |
| 80.93.128.0/20 | 4,096 | 80.93.128.0 – 80.93.143.255 |
| 91.143.192.0/20 | 4,096 | 91.143.192.0 – 91.143.207.255 |
| 79.108.136.0/21 | 2,048 | 79.108.136.0 – 79.108.143.255 |
| 83.137.56.0/21 | 2,048 | 83.137.56.0 – 83.137.63.255 |
| 87.247.232.0/21 | 2,048 | 87.247.232.0 – 87.247.239.255 |
| 109.122.208.0/21 | 2,048 | 109.122.208.0 – 109.122.215.255 |
| 45.84.140.0/22 | 1,024 | 45.84.140.0 – 45.84.143.255 |
| 45.143.36.0/22 | 1,024 | 45.143.36.0 – 45.143.39.255 |
| 45.151.12.0/22 | 1,024 | 45.151.12.0 – 45.151.15.255 |
| 45.151.64.0/22 | 1,024 | 45.151.64.0 – 45.151.67.255 |
| 103.26.124.0/22 | 1,024 | 103.26.124.0 – 103.26.127.255 |
| 103.43.232.0/22 | 1,024 | 103.43.232.0 – 103.43.235.255 |
| 103.61.184.0/22 | 1,024 | 103.61.184.0 – 103.61.187.255 |
| 103.248.184.0/22 | 1,024 | 103.248.184.0 – 103.248.187.255 |
| 144.48.192.0/22 | 1,024 | 144.48.192.0 – 144.48.195.255 |
| 185.125.64.0/22 | 1,024 | 185.125.64.0 – 185.125.67.255 |
| 185.158.116.0/22 | 1,024 | 185.158.116.0 – 185.158.119.255 |
| 185.170.36.0/22 | 1,024 | 185.170.36.0 – 185.170.39.255 |
| 185.224.60.0/22 | 1,024 | 185.224.60.0 – 185.224.63.255 |
| 185.224.104.0/22 | 1,024 | 185.224.104.0 – 185.224.107.255 |
46.44.192.0/18 78.152.96.0/19 79.135.32.0/19 94.138.160.0/19 213.182.64.0/19 80.93.128.0/20 91.143.192.0/20 79.108.136.0/21 83.137.56.0/21 87.247.232.0/21 109.122.208.0/21 45.84.140.0/22 45.143.36.0/22 45.151.12.0/22 45.151.64.0/22 103.26.124.0/22 103.43.232.0/22 103.61.184.0/22 103.248.184.0/22 144.48.192.0/22 185.125.64.0/22 185.158.116.0/22 185.170.36.0/22 185.224.60.0/22 185.224.104.0/22
The 25 largest of 41. The API and the database have all of them.
IPv6 prefixes
1 prefix- 2a00:14f8::/32
2a00:14f8::/32
Query AS21056 with the API
The ASN lookup returns everything on this page as JSON, including every prefix. ASN lookups need an API key: a free account comes with 1,000 requests a day.
curl "https://api.ipapi.is/?q=AS21056&key=YOUR_API_KEY"Any address in its prefixes resolves to AS21056, with or without a key:
curl "https://api.ipapi.is/?q=46.44.192.1"