Network · AS16171

AS16171 Fulnett Limited

AS16171 (Fulnett Limited) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS16171

OwnerFulnett Limited
KindInternet service provider
Servers, not peopleno
IPv4 addresses26,624
IPv4 ranges6
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

77.107.192.0/18
217.75.0.0/20
88.151.0.0/21
31.216.232.0/21
185.146.184.0/22
185.144.124.0/22

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

Check an IP address →

Detect it in code

Spot AS16171 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 AS16171

Is AS16171 a datacenter or VPN network?

AS16171 (Fulnett Limited) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS16171?

AS16171 is registered to Fulnett Limited. It announces about 26,624 IPv4 addresses.

How do I detect traffic from AS16171?

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.