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

AS12874 · FASTWEB

Fastweb SpA

AS12874 is owned by Fastweb SpA and is a major transit provider, based 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.

  • Top 5% — Top 5% of all autonomous systems by reach and degree
  • #3 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
August 24, 2026 (active)

Prefix Summary

IPv4 Prefixes (raw / aggregated)
110 / 63
IPv6 Prefixes (raw / aggregated)
18 / 1
IPv4 Addresses
3 563 008
Largest IPv4 Prefix
/11 (2 097 152 addresses)
Largest IPv6 Prefix
/29
Geolocated Countries
🇮🇹 Italy (7 111 424 IPs), 🇺🇸 United States (1 280 IPs), 🇦🇺 Australia (1 024 IPs) and 2 more
Prefix Changed
June 05, 2026

Reputation

Reputation
Good — 37 flagged IPs out of 3 563 008 total (0.00%)

Connectivity Summary

Upstream Providers
6 upstreams providing transit
Peers
62 networks exchanging traffic without transit
Downstream Customers
202 downstreams buying transit
Unclassified
15 unclassified BGP neighbors
Degree
285 unique BGP neighbors
Reach
240 networks in customer cone

Upstream Providers (6)

Prefix Lists

IPv4 Prefixes (110 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))
  • 81.208.0.0/17 (32 768 addresses (/17 prefix))
  • 151.0.128.0/17 (32 768 addresses (/17 prefix))
  • 62.101.64.0/18 (16 384 addresses (/18 prefix))
  • 37.186.192.0/18 (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))
  • 185.219.180.0/22 (1 024 addresses (/22 prefix))
  • 185.69.188.0/22 (1 024 addresses (/22 prefix))
  • 185.36.72.0/22 (1 024 addresses (/22 prefix))
  • 185.169.184.0/22 (1 024 addresses (/22 prefix))
  • 185.7.112.0/22 (1 024 addresses (/22 prefix))
  • 193.27.28.0/22 (1 024 addresses (/22 prefix))
  • 45.82.228.0/22 (1 024 addresses (/22 prefix))
  • 193.35.4.0/22 (1 024 addresses (/22 prefix))
  • 91.225.244.0/22 (1 024 addresses (/22 prefix))
  • 194.59.208.0/22 (1 024 addresses (/22 prefix))
  • 92.242.172.0/22 (1 024 addresses (/22 prefix))
  • 185.190.214.0/23 (512 addresses (/23 prefix))
  • 185.22.84.0/23 (512 addresses (/23 prefix))
  • 193.43.16.0/23 (512 addresses (/23 prefix))
  • 185.139.48.0/23 (512 addresses (/23 prefix))
  • 176.122.196.0/23 (512 addresses (/23 prefix))
  • 185.27.72.0/23 (512 addresses (/23 prefix))
  • 85.118.144.0/23 (512 addresses (/23 prefix))
  • 62.182.103.0/24 (256 addresses (/24 prefix))
  • 185.223.153.0/24 (256 addresses (/24 prefix))
  • 84.53.184.0/24 (256 addresses (/24 prefix))
  • 185.43.19.0/24 (256 addresses (/24 prefix))
  • 80.67.66.0/24 (256 addresses (/24 prefix))
  • 170.248.136.0/24 (256 addresses (/24 prefix))
  • 185.146.134.0/24 (256 addresses (/24 prefix))
  • 185.162.179.0/24 (256 addresses (/24 prefix))
  • 64.126.250.0/24 (256 addresses (/24 prefix))
  • 2.16.17.0/24 (256 addresses (/24 prefix))
  • 89.43.192.0/24 (256 addresses (/24 prefix))
  • 185.219.232.0/24 (256 addresses (/24 prefix))
  • 185.219.234.0/24 (256 addresses (/24 prefix))
  • 176.122.198.0/24 (256 addresses (/24 prefix))
  • 193.3.50.0/24 (256 addresses (/24 prefix))

IPv6 Prefixes (18 total)

  • 2001:b00::/29