Network · AS51935

AS51935 BLC Telecom Oy

AS51935 (BLC Telecom Oy) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS51935

OwnerBLC Telecom Oy
KindInternet service provider
Servers, not peopleno
IPv4 addresses28,672
IPv4 ranges5
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

46.163.192.0/18
83.146.160.0/19
62.220.240.0/21
62.220.248.0/22
185.192.24.0/22

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

Check an IP address →

Detect it in code

Spot AS51935 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 AS51935

Is AS51935 a datacenter or VPN network?

AS51935 (BLC Telecom Oy) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS51935?

AS51935 is registered to BLC Telecom Oy. It announces about 28,672 IPv4 addresses.

How do I detect traffic from AS51935?

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.