Network · AS29321

AS29321 O2 Czech Republic, a.s.

AS29321 (O2 Czech Republic, a.s.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS29321

OwnerO2 Czech Republic, a.s.
KindInternet service provider
Servers, not peopleno
IPv4 addresses15,360
IPv4 ranges5
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

80.243.96.0/20
217.195.160.0/20
109.239.64.0/20
94.143.168.0/21
194.59.240.0/22

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

Check an IP address →

Detect it in code

Spot AS29321 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 AS29321

Is AS29321 a datacenter or VPN network?

AS29321 (O2 Czech Republic, a.s.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS29321?

AS29321 is registered to O2 Czech Republic, a.s.. It announces about 15,360 IPv4 addresses.

How do I detect traffic from AS29321?

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.