Network · AS28591

AS28591 MCM Telecom Ltda.

AS28591 (MCM Telecom Ltda.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS28591

OwnerMCM Telecom Ltda.
KindInternet service provider
Servers, not peopleno
IPv4 addresses6,144
IPv4 ranges2
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

200.142.144.0/20
177.55.80.0/21

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

Check an IP address →

Detect it in code

Spot AS28591 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 AS28591

Is AS28591 a datacenter or VPN network?

AS28591 (MCM Telecom Ltda.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS28591?

AS28591 is registered to MCM Telecom Ltda.. It announces about 6,144 IPv4 addresses.

How do I detect traffic from AS28591?

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.