Network · AS57981

AS57981 Kachanovskiy Sergey Sergeevich

AS57981 (Kachanovskiy Sergey Sergeevich) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS57981

OwnerKachanovskiy Sergey Sergeevich
KindInternet service provider
Servers, not peopleno
IPv4 addresses1,536
IPv4 ranges2
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

91.215.56.0/22
91.237.114.0/23

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

Check an IP address →

Detect it in code

Spot AS57981 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 AS57981

Is AS57981 a datacenter or VPN network?

AS57981 (Kachanovskiy Sergey Sergeevich) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS57981?

AS57981 is registered to Kachanovskiy Sergey Sergeevich. It announces about 1,536 IPv4 addresses.

How do I detect traffic from AS57981?

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.