Network · AS25831

AS25831 Prefix Network LLC

AS25831 (Prefix Network LLC) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS25831

OwnerPrefix Network LLC
KindInternet service provider
Servers, not peopleno
IPv4 addresses8,448
IPv4 ranges6
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

9.237.32.0/20
192.26.72.0/22
192.26.68.0/22
188.221.200.0/22
188.221.124.0/22
108.186.124.0/24

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

Check an IP address →

Detect it in code

Spot AS25831 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 AS25831

Is AS25831 a datacenter or VPN network?

AS25831 (Prefix Network LLC) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS25831?

AS25831 is registered to Prefix Network LLC. It announces about 8,448 IPv4 addresses.

How do I detect traffic from AS25831?

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.