AS12874 FASTWEB Fastweb SpA

FASTWEB Fastweb SpA · registered in Italy

IPv4 addresses3,562,75263 prefixes · 0.114% of announced IPv4

Rank in Italy#4largest network in IT by IPv4 space, of 1,081 · 6.87% of IT

Rank worldwide#135of 79,396 networks with IPv4

IPv68 x /32 (524,288 x /48)1 prefixes

CountryItaly1,121 ASNs registered there

Open AS12874 in ASN lookup Look up an IP in this network (2.16.17.1) All networks in Italy

IPv4 prefixes

All 63 prefixes, in address order.

2.16.17.0/24
2.19.179.0/24
2.224.0.0/12
5.1.44.0/24
5.152.240.0/21
23.61.204.0/24
31.131.240.0/21
37.99.240.0/24
37.153.135.0/24
37.186.192.0/18
45.82.228.0/22
45.90.124.0/24
62.101.64.0/18
62.177.0.0/20
62.182.103.0/24
64.126.250.0/24
80.67.66.0/24
81.208.0.0/17
83.103.0.0/17
84.53.184.0/24
85.18.0.0/16
85.118.145.0/24
89.39.200.0/24
89.43.192.0/24
89.96.0.0/15
91.225.244.0/22
92.223.128.0/17
92.242.172.0/22
93.32.0.0/11
151.0.128.0/17
158.255.240.0/21
170.248.136.0/24
176.122.196.0/23
176.122.198.0/24
185.7.112.0/22
185.22.84.0/23
185.27.72.0/23
185.36.72.0/22
185.43.19.0/24
185.69.188.0/22
185.139.48.0/23
185.146.134.0/24
185.162.179.0/24
185.169.184.0/22
185.190.214.0/23
185.219.180.0/22
185.219.232.0/24
185.219.234.0/24
185.223.153.0/24
193.3.50.0/24
193.27.28.0/22
193.35.4.0/22
193.42.234.0/24
193.42.238.0/24
193.43.16.0/23
193.169.20.0/24
193.193.0.0/19
194.5.146.0/24
194.59.208.0/22
194.63.146.0/24
194.99.35.0/24
213.140.0.0/19
213.156.32.0/19

IPv6 prefixes

All 1 prefix.

2001:b00::/29

Similar-sized networks in Italy

ASNNameIPv4 addresses

AS3269#1 ASN-IBSNAZ Telecom Italia S.p.A.19,699,456

AS1267#2 ASN-WINDTRE WIND TRE S.P.A.7,396,352

AS30722#3 VODAFONE-IT-ASN Fastweb SpA5,575,936

AS137#5 ASGARR Consortium GARR2,761,728

AS16232#6 ASN-TIM Telecom Italia S.p.A.1,777,664

AS8968#7 BT-Italia RETELIT-X S.R.L.821,504

IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources