Network · AS33873

AS33873 Arvato Systems GmbH

AS33873 (Arvato Systems GmbH) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS33873

  • OwnerArvato Systems GmbH
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses88,832
  • IPv4 ranges10
  • IPv6 ranges2
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 145.228.0.0/16
  • 84.17.160.0/19
  • 146.185.96.0/19
  • 91.105.240.0/21
  • 109.235.136.0/21
  • 185.79.168.0/22
  • 194.31.6.0/23
  • 185.29.116.0/23
  • 156.67.12.0/23
  • 194.127.102.0/24

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

Check an IP address →

Detect it in code

Spot AS33873 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 AS33873

Is AS33873 a datacenter or VPN network?

AS33873 (Arvato Systems GmbH) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS33873?

AS33873 is registered to Arvato Systems GmbH. It announces about 88,832 IPv4 addresses.

How do I detect traffic from AS33873?

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.