Network · AS42763

AS42763 FPUH Czajen Krzysztof Czaja

AS42763 (FPUH Czajen Krzysztof Czaja) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS42763

OwnerFPUH Czajen Krzysztof Czaja
KindInternet service provider
Servers, not peopleno
IPv4 addresses3,584
IPv4 ranges3
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

77.87.0.0/21
91.193.120.0/22
193.33.174.0/23

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

Check an IP address →

Detect it in code

Spot AS42763 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 AS42763

Is AS42763 a datacenter or VPN network?

AS42763 (FPUH Czajen Krzysztof Czaja) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS42763?

AS42763 is registered to FPUH Czajen Krzysztof Czaja. It announces about 3,584 IPv4 addresses.

How do I detect traffic from AS42763?

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.