Network · AS202123

AS202123 Nationale Alarmzentrale

AS202123 (Nationale Alarmzentrale) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS202123

OwnerNationale Alarmzentrale
KindInternet service provider
Servers, not peopleno
IPv4 addresses1,792
IPv4 ranges3
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

185.51.68.0/22
193.246.124.0/23
193.135.172.0/24

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

Check an IP address →

Detect it in code

Spot AS202123 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 AS202123

Is AS202123 a datacenter or VPN network?

AS202123 (Nationale Alarmzentrale) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS202123?

AS202123 is registered to Nationale Alarmzentrale. It announces about 1,792 IPv4 addresses.

How do I detect traffic from AS202123?

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.