$ query “AS12874” --type=asn → 1 result(s)
AS12874 — FASTWEB
Fastweb SpA
AS12874 is a major transit provider registered to Fastweb SpA, established in Italy in 2002. The network announces an impressive 3.6 million IPv4 addresses, including a /11. Supports IPv6.
- Top 5% — Top 5% of all autonomous systems by reach and degree
- #4 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
- March 04, 2026
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 112 / 65
- IPv6 Prefixes (raw / aggregated)
- 19 / 2
- IPv4 Addresses
- 3 564 544
- Largest IPv4 Prefix
- /11 (2 097 152 addresses)
- Largest IPv6 Prefix
- /29
- Geolocated Countries
- 🇮🇹 IT (91 IPs), 🇺🇸 US (4 IPs), 🇦🇺 AU (3 IPs), 🇫🇷 FR, 🇪🇸 ES
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Good — 43 flagged IPs out of 3 564 544 total (0.00%)
- Open Proxies
- 1 known open proxies in this network
Connectivity Summary
- Upstream Providers
- 5 upstream autonomous systems providing transit
- Peers
- 63 autonomous systems exchanging traffic without transit fees
- Downstream Customers
- 200 downstream autonomous systems buying transit
- Degree
- 283 unique BGP neighbors (providers + customers + peers)
- Reach
- 227 — customer cone size measuring network influence
- Degree Rank
- #464
- Reach Rank
- #809
- Country Rank
- #4
Upstream Providers (5)
Prefix Lists
IPv4 Prefixes (112 total)
- 93.32.0.0/11 (2 097 152 addresses)
- 2.224.0.0/12 (1 048 576 addresses)
- 89.96.0.0/15 (131 072 addresses)
- 85.18.0.0/16 (65 536 addresses)
- 81.208.0.0/17 (32 768 addresses)
- 83.103.0.0/17 (32 768 addresses)
- 92.223.128.0/17 (32 768 addresses)
- 151.0.128.0/17 (32 768 addresses)
- 37.186.192.0/18 (16 384 addresses)
- 62.101.64.0/18 (16 384 addresses)
- 193.193.0.0/19 (8 192 addresses)
- 213.140.0.0/19 (8 192 addresses)
- 213.156.32.0/19 (8 192 addresses)
- 62.177.0.0/20 (4 096 addresses)
- 5.152.240.0/21 (2 048 addresses)
- 31.131.240.0/21 (2 048 addresses)
- 158.255.240.0/21 (2 048 addresses)
- 45.82.228.0/22 (1 024 addresses)
- 91.225.244.0/22 (1 024 addresses)
- 92.242.172.0/22 (1 024 addresses)
- 185.7.112.0/22 (1 024 addresses)
- 185.36.72.0/22 (1 024 addresses)
- 185.69.188.0/22 (1 024 addresses)
- 185.87.68.0/22 (1 024 addresses)
- 185.169.184.0/22 (1 024 addresses)
- 185.219.180.0/22 (1 024 addresses)
- 193.27.28.0/22 (1 024 addresses)
- 193.35.4.0/22 (1 024 addresses)
- 194.59.208.0/22 (1 024 addresses)
- 85.118.144.0/23 (512 addresses)
- 176.122.196.0/23 (512 addresses)
- 185.22.84.0/23 (512 addresses)
- 185.27.72.0/23 (512 addresses)
- 185.135.114.0/23 (512 addresses)
- 185.139.48.0/23 (512 addresses)
- 185.190.214.0/23 (512 addresses)
- 193.43.16.0/23 (512 addresses)
- 2.16.17.0/24 (256 addresses)
- 2.19.179.0/24 (256 addresses)
- 5.1.44.0/24 (256 addresses)
- 23.61.204.0/24 (256 addresses)
- 37.99.240.0/24 (256 addresses)
- 37.153.135.0/24 (256 addresses)
- 45.90.124.0/24 (256 addresses)
- 62.182.103.0/24 (256 addresses)
- 64.126.250.0/24 (256 addresses)
- 80.67.66.0/24 (256 addresses)
- 84.53.184.0/24 (256 addresses)
- 89.39.200.0/24 (256 addresses)
- 89.43.192.0/24 (256 addresses)
IPv6 Prefixes (19 total)
- 2001:b00::/29
- 2a04:a580::/29