Network · AS15731

AS15731 InterLIR GmbH

AS15731 (InterLIR GmbH) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS15731

  • OwnerInterLIR GmbH
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses2,304
  • IPv4 ranges8
  • IPv6 ranges0
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 153.52.118.0/23
  • 89.35.73.0/24
  • 163.5.243.0/24
  • 162.35.230.0/24
  • 153.76.205.0/24
  • 153.76.195.0/24
  • 13.143.248.0/24
  • 13.143.227.0/24

Ranges and owner from DB-IP (CC BY 4.0), updated 2026-10-22.

Check an IP address →

Detect it in code

Spot AS15731 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 AS15731

Is AS15731 a datacenter or VPN network?

AS15731 (InterLIR GmbH) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS15731?

AS15731 is registered to InterLIR GmbH. It announces about 2,304 IPv4 addresses.

How do I detect traffic from AS15731?

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.