Network · AS6661

AS6661 POST Luxembourg

AS6661 (POST Luxembourg) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS6661

  • OwnerPOST Luxembourg
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses219,904
  • IPv4 ranges22
  • IPv6 ranges1
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 88.207.128.0/17
  • 83.99.0.0/17
  • 107.183.0.0/17
  • 87.240.192.0/18
  • 78.141.128.0/18
  • 188.115.0.0/18
  • 178.254.64.0/18
  • 146.0.128.0/18
  • 213.166.32.0/19
  • 213.135.224.0/19
  • 195.46.224.0/19
  • 194.154.208.0/20

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

Check an IP address →

Detect it in code

Spot AS6661 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 AS6661

Is AS6661 a datacenter or VPN network?

AS6661 (POST Luxembourg) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS6661?

AS6661 is registered to POST Luxembourg. It announces about 219,904 IPv4 addresses.

How do I detect traffic from AS6661?

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.