Network · AS31221

AS31221 nLighten France SAS

AS31221 (nLighten France SAS) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS31221

OwnernLighten France SAS
KindInternet service provider
Servers, not peopleno
IPv4 addresses5,632
IPv4 ranges6
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

217.13.48.0/20
185.43.36.0/23
5.252.57.0/24
193.218.120.0/24
193.135.126.0/24
185.43.39.0/24

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

Check an IP address →

Detect it in code

Spot AS31221 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 AS31221

Is AS31221 a datacenter or VPN network?

AS31221 (nLighten France SAS) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS31221?

AS31221 is registered to nLighten France SAS. It announces about 5,632 IPv4 addresses.

How do I detect traffic from AS31221?

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.