Network · AS21738

AS21738 Rozint Ltd Co

AS21738 (Rozint Ltd Co) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS21738

OwnerRozint Ltd Co
KindInternet service provider
Servers, not peopleno
IPv4 addresses2,560
IPv4 ranges6
IPv6 ranges5

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

216.40.92.0/22
23.150.40.0/23
43.255.189.0/24
2.59.255.0/24
185.125.142.0/24
140.235.156.0/24

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

Check an IP address →

Detect it in code

Spot AS21738 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 AS21738

Is AS21738 a datacenter or VPN network?

AS21738 (Rozint Ltd Co) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS21738?

AS21738 is registered to Rozint Ltd Co. It announces about 2,560 IPv4 addresses.

How do I detect traffic from AS21738?

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.