Network · AS61323

AS61323 UKFAST.NET LIMITED

AS61323 (UKFAST.NET LIMITED) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS61323

OwnerUKFAST.NET LIMITED
KindInternet service provider
Servers, not peopleno
IPv4 addresses80,896
IPv4 ranges46
IPv6 ranges4

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

46.37.160.0/19
109.108.128.0/19
94.229.160.0/20
81.201.128.0/20
80.244.176.0/20
78.137.112.0/20
78.109.160.0/20
31.193.0.0/20
178.238.128.0/20
37.220.88.0/21
159.253.208.0/21
80.66.200.0/22

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

Check an IP address →

Detect it in code

Spot AS61323 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 AS61323

Is AS61323 a datacenter or VPN network?

AS61323 (UKFAST.NET LIMITED) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS61323?

AS61323 is registered to UKFAST.NET LIMITED. It announces about 80,896 IPv4 addresses.

How do I detect traffic from AS61323?

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.