Autonomous System
AS12874 Fastweb SpA
ISPActiveItalyRIPE
AS12874 (FASTWEB) is an ISP network operated by Fastweb SpA in Italy, registered with RIPE. It has 93 IPv4 prefixes with 5,890,560 addresses and 18 IPv6 prefixes, which makes it the 113th largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses5,890,560in 93 prefixes
IPv6 prefixes18≈ 7.9 × 10²⁹ addresses
Size rank#113of 82,200 active ASNs
Details
OrganizationFastweb SpA
AS nameFASTWEB
Websitefastweb.it
Country Italy (IT)
Network typeISP
RegistryRIPE
Abuse contactabuse@fastweb.it
Registered2002-09-13
Last updated2026-09-16
IPv4 prefixes
93 prefixes · 5,890,560 addresses| Network | Addresses | First – last address |
|---|---|---|
| 93.32.0.0/12 | 1,048,576 | 93.32.0.0 – 93.47.255.255 |
| 2.224.0.0/13 | 524,288 | 2.224.0.0 – 2.231.255.255 |
| 2.232.0.0/13 | 524,288 | 2.232.0.0 – 2.239.255.255 |
| 93.32.0.0/13 | 524,288 | 93.32.0.0 – 93.39.255.255 |
| 93.40.0.0/13 | 524,288 | 93.40.0.0 – 93.47.255.255 |
| 93.48.0.0/13 | 524,288 | 93.48.0.0 – 93.55.255.255 |
| 93.32.0.0/14 | 262,144 | 93.32.0.0 – 93.35.255.255 |
| 93.36.0.0/14 | 262,144 | 93.36.0.0 – 93.39.255.255 |
| 93.40.0.0/14 | 262,144 | 93.40.0.0 – 93.43.255.255 |
| 93.44.0.0/14 | 262,144 | 93.44.0.0 – 93.47.255.255 |
| 93.56.0.0/14 | 262,144 | 93.56.0.0 – 93.59.255.255 |
| 89.96.0.0/15 | 131,072 | 89.96.0.0 – 89.97.255.255 |
| 93.60.0.0/15 | 131,072 | 93.60.0.0 – 93.61.255.255 |
| 93.62.0.0/15 | 131,072 | 93.62.0.0 – 93.63.255.255 |
| 85.18.0.0/16 | 65,536 | 85.18.0.0 – 85.18.255.255 |
| 89.96.0.0/16 | 65,536 | 89.96.0.0 – 89.96.255.255 |
| 89.97.0.0/16 | 65,536 | 89.97.0.0 – 89.97.255.255 |
| 83.103.0.0/17 | 32,768 | 83.103.0.0 – 83.103.127.255 |
| 85.18.0.0/17 | 32,768 | 85.18.0.0 – 85.18.127.255 |
| 85.18.128.0/17 | 32,768 | 85.18.128.0 – 85.18.255.255 |
| 92.223.128.0/17 | 32,768 | 92.223.128.0 – 92.223.255.255 |
| 151.0.128.0/17 | 32,768 | 151.0.128.0 – 151.0.255.255 |
| 37.186.192.0/18 | 16,384 | 37.186.192.0 – 37.186.255.255 |
| 81.208.0.0/18 | 16,384 | 81.208.0.0 – 81.208.63.255 |
| 81.208.64.0/18 | 16,384 | 81.208.64.0 – 81.208.127.255 |
93.32.0.0/12 2.224.0.0/13 2.232.0.0/13 93.32.0.0/13 93.40.0.0/13 93.48.0.0/13 93.32.0.0/14 93.36.0.0/14 93.40.0.0/14 93.44.0.0/14 93.56.0.0/14 89.96.0.0/15 93.60.0.0/15 93.62.0.0/15 85.18.0.0/16 89.96.0.0/16 89.97.0.0/16 83.103.0.0/17 85.18.0.0/17 85.18.128.0/17 92.223.128.0/17 151.0.128.0/17 37.186.192.0/18 81.208.0.0/18 81.208.64.0/18
The 25 largest of 93. The API and the database have all of them.
IPv6 prefixes
18 prefixes- 2001:b00::/29
- 2001:b07::/32
- 2001:b07::/36
- 2001:b07:1000::/36
- 2001:b07:2000::/36
- 2001:b07:3000::/36
- 2001:b07:4000::/36
- 2001:b07:5000::/36
- 2001:b07:6000::/36
- 2001:b07:7000::/36
- 2001:b07:8000::/36
- 2001:b07:9000::/36
- 2001:b07:a000::/36
- 2001:b07:b000::/36
- 2001:b07:c000::/36
- 2001:b07:d000::/36
- 2001:b07:e000::/36
- 2001:b07:f000::/36
2001:b00::/29 2001:b07::/32 2001:b07::/36 2001:b07:1000::/36 2001:b07:2000::/36 2001:b07:3000::/36 2001:b07:4000::/36 2001:b07:5000::/36 2001:b07:6000::/36 2001:b07:7000::/36 2001:b07:8000::/36 2001:b07:9000::/36 2001:b07:a000::/36 2001:b07:b000::/36 2001:b07:c000::/36 2001:b07:d000::/36 2001:b07:e000::/36 2001:b07:f000::/36
Query AS12874 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=AS12874&key=YOUR_API_KEY"Any address in its prefixes resolves to AS12874, with or without a key:
curl "https://api.ipapi.is/?q=93.32.0.1"