Network · AS51553

AS51553 Telecom Plus PLC

AS51553 (Telecom Plus PLC) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS51553

OwnerTelecom Plus PLC
KindInternet service provider
Servers, not peopleno
IPv4 addresses2,816
IPv4 ranges6
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

85.91.52.0/22
85.91.56.0/23
85.91.50.0/23
91.217.237.0/24
85.91.59.0/24
85.91.49.0/24

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

Check an IP address →

Detect it in code

Spot AS51553 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 AS51553

Is AS51553 a datacenter or VPN network?

AS51553 (Telecom Plus PLC) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS51553?

AS51553 is registered to Telecom Plus PLC. It announces about 2,816 IPv4 addresses.

How do I detect traffic from AS51553?

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.