Network · AS203157

AS203157 Lukasz Kazimierczak Cronel

AS203157 (Lukasz Kazimierczak Cronel) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS203157

OwnerLukasz Kazimierczak Cronel
KindInternet service provider
Servers, not peopleno
IPv4 addresses1,280
IPv4 ranges2
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

91.222.108.0/22
185.122.174.0/24

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

Check an IP address →

Detect it in code

Spot AS203157 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 AS203157

Is AS203157 a datacenter or VPN network?

AS203157 (Lukasz Kazimierczak Cronel) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS203157?

AS203157 is registered to Lukasz Kazimierczak Cronel. It announces about 1,280 IPv4 addresses.

How do I detect traffic from AS203157?

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.