Network · AS28573

AS28573 Claro NXT Telecomunicacoes Ltda

AS28573 (Claro NXT Telecomunicacoes Ltda) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS28573

  • OwnerClaro NXT Telecomunicacoes Ltda
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses9,953,024
  • IPv4 ranges308
  • IPv6 ranges207
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 191.176.0.0/13
  • 179.136.0.0/13
  • 201.80.0.0/14
  • 191.188.0.0/14
  • 189.60.0.0/14
  • 189.4.0.0/14
  • 189.120.0.0/14
  • 189.100.0.0/14
  • 187.180.0.0/14
  • 186.204.0.0/14
  • 179.152.0.0/14
  • 177.80.0.0/14

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

Check an IP address →

Detect it in code

Spot AS28573 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 AS28573

Is AS28573 a datacenter or VPN network?

AS28573 (Claro NXT Telecomunicacoes Ltda) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS28573?

AS28573 is registered to Claro NXT Telecomunicacoes Ltda. It announces about 9,953,024 IPv4 addresses.

How do I detect traffic from AS28573?

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.