Network · AS49101

AS49101 CEZNET s.r.o.

AS49101 (CEZNET s.r.o.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS49101

OwnerCEZNET s.r.o.
KindInternet service provider
Servers, not peopleno
IPv4 addresses13,312
IPv4 ranges14
IPv6 ranges17

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

46.36.48.0/20
82.144.152.0/21
82.144.128.0/21
82.144.148.0/22
82.144.144.0/23
82.144.140.0/23
82.144.138.0/23
46.36.46.0/23
46.36.42.0/23
46.36.32.0/23
82.144.142.0/24
82.144.137.0/24

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

Check an IP address →

Detect it in code

Spot AS49101 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 AS49101

Is AS49101 a datacenter or VPN network?

AS49101 (CEZNET s.r.o.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS49101?

AS49101 is registered to CEZNET s.r.o.. It announces about 13,312 IPv4 addresses.

How do I detect traffic from AS49101?

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.