Network · AS24603

AS24603 Ulf Kieber

AS24603 (Ulf Kieber) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS24603

OwnerUlf Kieber
KindInternet service provider
Servers, not peopleno
IPv4 addresses2,816
IPv4 ranges4
IPv6 ranges2

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

45.152.100.0/22
185.105.80.0/22
195.42.100.0/23
193.108.179.0/24

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

Check an IP address →

Detect it in code

Spot AS24603 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 AS24603

Is AS24603 a datacenter or VPN network?

AS24603 (Ulf Kieber) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS24603?

AS24603 is registered to Ulf Kieber. It announces about 2,816 IPv4 addresses.

How do I detect traffic from AS24603?

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.