Network · AS219531

AS219531 CHECK24 GmbH

AS219531 (CHECK24 GmbH) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS219531

OwnerCHECK24 GmbH
KindInternet service provider
Servers, not peopleno
IPv4 addresses2,304
IPv4 ranges2
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

31.170.192.0/21
86.105.240.0/24

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

Check an IP address →

Detect it in code

Spot AS219531 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 AS219531

Is AS219531 a datacenter or VPN network?

AS219531 (CHECK24 GmbH) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS219531?

AS219531 is registered to CHECK24 GmbH. It announces about 2,304 IPv4 addresses.

How do I detect traffic from AS219531?

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.