Network · AS12663

AS12663 Fastweb SpA

AS12663 (Fastweb SpA) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS12663

  • OwnerFastweb SpA
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses450,560
  • IPv4 ranges155
  • IPv6 ranges2
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 145.230.0.0/16
  • 192.125.128.0/17
  • 46.108.128.0/18
  • 46.108.0.0/18
  • 208.53.128.0/18
  • 195.233.64.0/18
  • 195.233.192.0/18
  • 195.232.192.0/18
  • 130.195.64.0/18
  • 130.195.128.0/18
  • 46.190.160.0/19
  • 46.108.64.0/19

Ranges and owner from DB-IP (CC BY 4.0), updated 2026-10-21.

Check an IP address →

Detect it in code

Spot AS12663 traffic at signup.

Send the visitor's IP. The response includes the ASN, the owner and flags.hosting.

curl https://veqen-app.com/v1/ip/check \
  -H "Authorization: Bearer $VEQEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"ip": "203.0.113.7"}'
import os, requests

r = requests.post(
    "https://veqen-app.com/v1/ip/check",
    headers={"Authorization": f"Bearer {os.environ['VEQEN_API_KEY']}"},
    json={"ip": "203.0.113.7"},
    timeout=10,
)
result = r.json()
print(result["risk"]["verdict"], result["risk"]["reasons"])
const res = await fetch("https://veqen-app.com/v1/ip/check", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.VEQEN_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({"ip": "203.0.113.7"}),
});
const result = await res.json();
console.log(result.risk.verdict, result.risk.reasons);
Questions

About AS12663

Is AS12663 a datacenter or VPN network?

AS12663 (Fastweb SpA) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS12663?

AS12663 is registered to Fastweb SpA. It announces about 450,560 IPv4 addresses.

How do I detect traffic from AS12663?

Call the Veqen IP check with the visitor's address. The response includes the ASN, the owner and whether the network is a datacenter, VPN network, relay or ISP.