Network · AS24971

AS24971 MasterDC s.r.o.

AS24971 (MasterDC s.r.o.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS24971

OwnerMasterDC s.r.o.
KindInternet service provider
Servers, not peopleno
IPv4 addresses58,112
IPv4 ranges31
IPv6 ranges26

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

89.185.224.0/19
83.167.224.0/19
77.93.192.0/19
81.31.32.0/20
80.79.16.0/20
178.238.32.0/20
85.118.128.0/21
37.205.8.0/21
149.62.144.0/21
91.226.216.0/22
91.214.192.0/22
5.180.200.0/22

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

Check an IP address →

Detect it in code

Spot AS24971 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 AS24971

Is AS24971 a datacenter or VPN network?

AS24971 (MasterDC s.r.o.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS24971?

AS24971 is registered to MasterDC s.r.o.. It announces about 58,112 IPv4 addresses.

How do I detect traffic from AS24971?

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.