Network · AS43519

AS43519 Nominet UK

AS43519 (Nominet UK) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS43519

  • OwnerNominet UK
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses8,960
  • IPv4 ranges11
  • IPv6 ranges11
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 213.248.216.0/21
  • 43.230.48.0/22
  • 213.248.224.0/22
  • 213.248.200.0/22
  • 103.49.80.0/22
  • 51.149.254.0/23
  • 51.149.0.0/23
  • 213.248.204.0/23
  • 212.148.212.0/23
  • 194.227.194.0/23
  • 213.248.254.0/24

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

Check an IP address →

Detect it in code

Spot AS43519 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 AS43519

Is AS43519 a datacenter or VPN network?

AS43519 (Nominet UK) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS43519?

AS43519 is registered to Nominet UK. It announces about 8,960 IPv4 addresses.

How do I detect traffic from AS43519?

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.