Network · AS21369

AS21369 Atos IT Services UK Ltd

AS21369 (Atos IT Services UK Ltd) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS21369

  • OwnerAtos IT Services UK Ltd
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses8,704
  • IPv4 ranges12
  • IPv6 ranges0
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 157.203.56.0/21
  • 157.203.40.0/22
  • 157.203.176.0/22
  • 157.203.92.0/23
  • 157.203.6.0/23
  • 157.203.52.0/23
  • 157.203.48.0/23
  • 157.203.36.0/23
  • 157.203.254.0/23
  • 157.203.242.0/23
  • 157.203.180.0/23
  • 157.203.120.0/23

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

Check an IP address →

Detect it in code

Spot AS21369 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 AS21369

Is AS21369 a datacenter or VPN network?

AS21369 (Atos IT Services UK Ltd) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS21369?

AS21369 is registered to Atos IT Services UK Ltd. It announces about 8,704 IPv4 addresses.

How do I detect traffic from AS21369?

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.