Network · AS40021

AS40021 Contabo Inc.

AS40021 (Contabo Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS40021

  • OwnerContabo Inc.
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses145,408
  • IPv4 ranges61
  • IPv6 ranges0
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 66.94.96.0/19
  • 207.244.224.0/19
  • 154.53.32.0/19
  • 154.38.160.0/19
  • 154.12.224.0/19
  • 144.126.128.0/19
  • 94.72.112.0/20
  • 86.48.16.0/20
  • 217.77.0.0/20
  • 217.216.80.0/20
  • 212.56.32.0/20
  • 212.28.176.0/20

Ranges and owner from DB-IP (CC BY 4.0), updated 2026-10-22.

Check an IP address →

Detect it in code

Spot AS40021 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 AS40021

Is AS40021 a datacenter or VPN network?

AS40021 (Contabo Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS40021?

AS40021 is registered to Contabo Inc.. It announces about 145,408 IPv4 addresses.

How do I detect traffic from AS40021?

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.