Network · AS12437

AS12437 DTS Systeme Muenster GmbH

AS12437 (DTS Systeme Muenster GmbH) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS12437

  • OwnerDTS Systeme Muenster GmbH
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses8,960
  • IPv4 ranges8
  • IPv6 ranges1
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 212.101.208.0/20
  • 212.101.192.0/21
  • 212.101.204.0/22
  • 81.89.224.0/23
  • 212.101.202.0/23
  • 84.201.96.0/24
  • 212.62.79.0/24
  • 212.101.200.0/24

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

Check an IP address →

Detect it in code

Spot AS12437 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 AS12437

Is AS12437 a datacenter or VPN network?

AS12437 (DTS Systeme Muenster GmbH) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS12437?

AS12437 is registered to DTS Systeme Muenster GmbH. It announces about 8,960 IPv4 addresses.

How do I detect traffic from AS12437?

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.