Network · AS25375

AS25375 Leunet AG

AS25375 (Leunet AG) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS25375

OwnerLeunet AG
KindInternet service provider
Servers, not peopleno
IPv4 addresses14,848
IPv4 ranges6
IPv6 ranges2

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

212.203.32.0/19
37.131.184.0/21
109.71.88.0/21
185.33.248.0/22
185.196.84.0/22
193.246.110.0/23

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

Check an IP address →

Detect it in code

Spot AS25375 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 AS25375

Is AS25375 a datacenter or VPN network?

AS25375 (Leunet AG) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS25375?

AS25375 is registered to Leunet AG. It announces about 14,848 IPv4 addresses.

How do I detect traffic from AS25375?

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.