Network · AS21574

AS21574 Century Telecom Ltda

AS21574 (Century Telecom Ltda) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS21574

OwnerCentury Telecom Ltda
KindInternet service provider
Servers, not peopleno
IPv4 addresses13,312
IPv4 ranges4
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

200.169.0.0/20
187.1.176.0/20
186.249.224.0/20
168.227.200.0/22

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

Check an IP address →

Detect it in code

Spot AS21574 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 AS21574

Is AS21574 a datacenter or VPN network?

AS21574 (Century Telecom Ltda) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS21574?

AS21574 is registered to Century Telecom Ltda. It announces about 13,312 IPv4 addresses.

How do I detect traffic from AS21574?

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.