Network · AS25424

AS25424 CEZNET s.r.o.

AS25424 (CEZNET s.r.o.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS25424

OwnerCEZNET s.r.o.
KindInternet service provider
Servers, not peopleno
IPv4 addresses33,792
IPv4 ranges7
IPv6 ranges2

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

85.92.32.0/19
77.92.192.0/19
212.111.0.0/19
188.244.48.0/20
91.109.32.0/21
37.9.192.0/21
185.157.196.0/22

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

Check an IP address →

Detect it in code

Spot AS25424 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 AS25424

Is AS25424 a datacenter or VPN network?

AS25424 (CEZNET s.r.o.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS25424?

AS25424 is registered to CEZNET s.r.o.. It announces about 33,792 IPv4 addresses.

How do I detect traffic from AS25424?

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.