Network · AS51921

AS51921 OOO Integral telesystems

AS51921 (OOO Integral telesystems) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS51921

  • OwnerOOO Integral telesystems
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses256
  • IPv4 ranges1
  • IPv6 ranges0
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 185.58.205.0/24

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

Check an IP address →

Detect it in code

Spot AS51921 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 AS51921

Is AS51921 a datacenter or VPN network?

AS51921 (OOO Integral telesystems) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS51921?

AS51921 is registered to OOO Integral telesystems. It announces about 256 IPv4 addresses.

How do I detect traffic from AS51921?

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.