Network · AS51809

AS51809 BRSK Limited

AS51809 (BRSK Limited) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS51809

OwnerBRSK Limited
KindInternet service provider
Servers, not peopleno
IPv4 addresses30,976
IPv4 ranges17
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

88.97.176.0/20
31.98.80.0/20
195.40.32.0/20
88.97.160.0/21
63.135.72.0/21
45.61.104.0/21
31.98.72.0/21
195.40.48.0/21
104.238.40.0/21
89.127.224.0/22
67.208.52.0/22
45.82.140.0/22

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

Check an IP address →

Detect it in code

Spot AS51809 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 AS51809

Is AS51809 a datacenter or VPN network?

AS51809 (BRSK Limited) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS51809?

AS51809 is registered to BRSK Limited. It announces about 30,976 IPv4 addresses.

How do I detect traffic from AS51809?

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.