Network · AS50522

AS50522 Sewan Nederland B.V.

AS50522 (Sewan Nederland B.V.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS50522

OwnerSewan Nederland B.V.
KindInternet service provider
Servers, not peopleno
IPv4 addresses16,384
IPv4 ranges11
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

81.173.64.0/20
81.173.48.0/20
109.235.32.0/21
81.23.244.0/22
81.173.96.0/22
81.173.32.0/22
81.173.0.0/22
185.61.68.0/22
81.173.126.0/23
81.173.7.0/24
81.173.125.0/24

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

Check an IP address →

Detect it in code

Spot AS50522 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 AS50522

Is AS50522 a datacenter or VPN network?

AS50522 (Sewan Nederland B.V.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS50522?

AS50522 is registered to Sewan Nederland B.V.. It announces about 16,384 IPv4 addresses.

How do I detect traffic from AS50522?

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.