Network · AS203997

AS203997 XTDef Limited

AS203997 (XTDef Limited) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS203997

OwnerXTDef Limited
KindInternet service provider
Servers, not peopleno
IPv4 addresses1,536
IPv4 ranges6
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

89.23.94.0/24
81.18.60.0/24
191.44.74.0/24
179.61.243.0/24
164.138.4.0/24
151.244.252.0/24

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

Check an IP address →

Detect it in code

Spot AS203997 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 AS203997

Is AS203997 a datacenter or VPN network?

AS203997 (XTDef Limited) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS203997?

AS203997 is registered to XTDef Limited. It announces about 1,536 IPv4 addresses.

How do I detect traffic from AS203997?

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.