Network · AS43872

AS43872 Optinet U.K. Limited

AS43872 (Optinet U.K. Limited) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS43872

  • OwnerOptinet U.K. Limited
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses10,496
  • IPv4 ranges17
  • IPv6 ranges7
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 89.222.48.0/20
  • 5.253.252.0/22
  • 185.253.176.0/22
  • 185.183.20.0/22
  • 92.118.111.0/24
  • 91.201.105.0/24
  • 84.38.246.0/24
  • 45.136.108.0/24
  • 217.198.183.0/24
  • 195.234.28.0/24
  • 193.247.94.0/24
  • 193.247.165.0/24

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

Check an IP address →

Detect it in code

Spot AS43872 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 AS43872

Is AS43872 a datacenter or VPN network?

AS43872 (Optinet U.K. Limited) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS43872?

AS43872 is registered to Optinet U.K. Limited. It announces about 10,496 IPv4 addresses.

How do I detect traffic from AS43872?

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.