Network · AS27818

AS27818 Cotesma

AS27818 (Cotesma) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS27818

OwnerCotesma
KindInternet service provider
Servers, not peopleno
IPv4 addresses17,664
IPv4 ranges4
IPv6 ranges22

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

201.220.160.0/19
181.114.128.0/19
131.161.152.0/22
200.47.43.0/24

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

Check an IP address →

Detect it in code

Spot AS27818 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 AS27818

Is AS27818 a datacenter or VPN network?

AS27818 (Cotesma) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS27818?

AS27818 is registered to Cotesma. It announces about 17,664 IPv4 addresses.

How do I detect traffic from AS27818?

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.