$ query “AS12874” --type=asn → 1 result(s)

AS12874 · FASTWEB

Fastweb SpA

AS12874 belongs to Fastweb SpA and is a major transit provider, registered in Italy since 2002. The system announces an impressive 3.6 million IPv4 addresses, including a /11, and supports IPv6. Most of its address space is geolocated to Italy, with additional presence in the United States and Australia, and smaller footprints in 2 additional countries. This AS's prefix announcements have been recently modified.

  • Top 5% — Top 5% of all autonomous systems by reach and degree
  • #5 in Italy — Top 10 by reach within country

Basic Information

Country
🇮🇹 Italy
Category
Internet Service Provider
Network Role
Major Transit
Data Origin
Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
Registered
September 13, 2002
Last Changed
March 04, 2026
Last Seen
April 30, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
109 / 62
IPv6 Prefixes (raw / aggregated)
18 / 1
IPv4 Addresses
3 562 752
Largest IPv4 Prefix
/11 (2 097 152 addresses)
Largest IPv6 Prefix
/29
Geolocated Countries
🇮🇹 Italy (7 094 528 IPs), 🇺🇸 United States (1 024 IPs), 🇦🇺 Australia (768 IPs) and 2 more
Prefix Changed
April 29, 2026

Reputation

Reputation
Good — 40 flagged IPs out of 3 562 752 total (0.00%)

Connectivity Summary

Upstream Providers
6 upstreams providing transit
Peers
65 networks exchanging traffic without transit
Downstream Customers
196 downstreams buying transit
Unclassified
15 unclassified BGP neighbors
Degree
282 unique BGP neighbors
Reach
224 networks in customer cone

Upstream Providers (6)

Prefix Lists

IPv4 Prefixes (109 total)

  • 93.32.0.0/11 (2 097 152 addresses (/11 prefix))
  • 2.224.0.0/12 (1 048 576 addresses (/12 prefix))
  • 89.96.0.0/15 (131 072 addresses (/15 prefix))
  • 85.18.0.0/16 (65 536 addresses (/16 prefix))
  • 83.103.0.0/17 (32 768 addresses (/17 prefix))
  • 92.223.128.0/17 (32 768 addresses (/17 prefix))
  • 151.0.128.0/17 (32 768 addresses (/17 prefix))
  • 81.208.0.0/17 (32 768 addresses (/17 prefix))
  • 37.186.192.0/18 (16 384 addresses (/18 prefix))
  • 62.101.64.0/18 (16 384 addresses (/18 prefix))
  • 193.193.0.0/19 (8 192 addresses (/19 prefix))
  • 213.140.0.0/19 (8 192 addresses (/19 prefix))
  • 213.156.32.0/19 (8 192 addresses (/19 prefix))
  • 62.177.0.0/20 (4 096 addresses (/20 prefix))
  • 158.255.240.0/21 (2 048 addresses (/21 prefix))
  • 31.131.240.0/21 (2 048 addresses (/21 prefix))
  • 5.152.240.0/21 (2 048 addresses (/21 prefix))
  • 185.7.112.0/22 (1 024 addresses (/22 prefix))
  • 193.35.4.0/22 (1 024 addresses (/22 prefix))
  • 185.169.184.0/22 (1 024 addresses (/22 prefix))
  • 45.82.228.0/22 (1 024 addresses (/22 prefix))
  • 185.219.180.0/22 (1 024 addresses (/22 prefix))
  • 193.27.28.0/22 (1 024 addresses (/22 prefix))
  • 185.69.188.0/22 (1 024 addresses (/22 prefix))
  • 194.59.208.0/22 (1 024 addresses (/22 prefix))
  • 91.225.244.0/22 (1 024 addresses (/22 prefix))
  • 185.36.72.0/22 (1 024 addresses (/22 prefix))
  • 92.242.172.0/22 (1 024 addresses (/22 prefix))
  • 193.43.16.0/23 (512 addresses (/23 prefix))
  • 185.139.48.0/23 (512 addresses (/23 prefix))
  • 85.118.144.0/23 (512 addresses (/23 prefix))
  • 176.122.196.0/23 (512 addresses (/23 prefix))
  • 185.190.214.0/23 (512 addresses (/23 prefix))
  • 185.27.72.0/23 (512 addresses (/23 prefix))
  • 185.22.84.0/23 (512 addresses (/23 prefix))
  • 64.126.250.0/24 (256 addresses (/24 prefix))
  • 176.122.198.0/24 (256 addresses (/24 prefix))
  • 185.43.19.0/24 (256 addresses (/24 prefix))
  • 89.43.192.0/24 (256 addresses (/24 prefix))
  • 89.39.200.0/24 (256 addresses (/24 prefix))
  • 185.146.134.0/24 (256 addresses (/24 prefix))
  • 185.162.179.0/24 (256 addresses (/24 prefix))
  • 84.53.184.0/24 (256 addresses (/24 prefix))
  • 80.67.66.0/24 (256 addresses (/24 prefix))
  • 2.16.17.0/24 (256 addresses (/24 prefix))
  • 185.219.232.0/24 (256 addresses (/24 prefix))
  • 185.219.234.0/24 (256 addresses (/24 prefix))
  • 185.223.153.0/24 (256 addresses (/24 prefix))
  • 193.3.50.0/24 (256 addresses (/24 prefix))
  • 62.182.103.0/24 (256 addresses (/24 prefix))
  • and 12 more

IPv6 Prefixes (18 total)

  • 2001:b00::/29