Network · AS15851

AS15851 Wroclaw Centre of Networking and Supercomputing

AS15851 (Wroclaw Centre of Networking and Supercomputing) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS15851

  • OwnerWroclaw Centre of Networking and Super
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses22,016
  • IPv4 ranges11
  • IPv6 ranges1
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 213.231.224.0/19
  • 213.231.208.0/20
  • 213.231.200.0/21
  • 212.127.80.0/21
  • 212.127.64.0/21
  • 213.231.192.0/22
  • 212.127.72.0/22
  • 213.231.198.0/23
  • 212.127.76.0/23
  • 213.231.196.0/24
  • 212.127.79.0/24

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

Check an IP address →

Detect it in code

Spot AS15851 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 AS15851

Is AS15851 a datacenter or VPN network?

AS15851 (Wroclaw Centre of Networking and Supercomputing) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS15851?

AS15851 is registered to Wroclaw Centre of Networking and Supercomputing. It announces about 22,016 IPv4 addresses.

How do I detect traffic from AS15851?

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.