Network · AS57643

AS57643 AirCity Krzysztof Janukowicz

AS57643 (AirCity Krzysztof Janukowicz) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS57643

OwnerAirCity Krzysztof Janukowicz
KindInternet service provider
Servers, not peopleno
IPv4 addresses5,120
IPv4 ranges6
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

91.235.20.0/22
194.28.40.0/22
185.188.164.0/22
185.174.120.0/22
91.235.24.0/23
91.207.166.0/23

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

Check an IP address →

Detect it in code

Spot AS57643 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 AS57643

Is AS57643 a datacenter or VPN network?

AS57643 (AirCity Krzysztof Janukowicz) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS57643?

AS57643 is registered to AirCity Krzysztof Janukowicz. It announces about 5,120 IPv4 addresses.

How do I detect traffic from AS57643?

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.