Network · AS2852

AS2852 CESNET z.s.p.o.

AS2852 (CESNET z.s.p.o.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS2852

OwnerCESNET z.s.p.o.
KindInternet service provider
Servers, not peopleno
IPv4 addresses849,920
IPv4 ranges21
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

160.216.0.0/15
147.32.0.0/15
147.230.0.0/15
195.113.0.0/16
158.196.0.0/16
158.194.0.0/16
147.251.0.0/16
147.228.0.0/16
146.102.0.0/16
78.128.128.0/17
195.178.64.0/19
193.84.192.0/19

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

Check an IP address →

Detect it in code

Spot AS2852 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 AS2852

Is AS2852 a datacenter or VPN network?

AS2852 (CESNET z.s.p.o.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS2852?

AS2852 is registered to CESNET z.s.p.o.. It announces about 849,920 IPv4 addresses.

How do I detect traffic from AS2852?

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.