Network · AS21373

AS21373 Banque Nationale de Belgique

AS21373 (Banque Nationale de Belgique) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS21373

OwnerBanque Nationale de Belgique
KindInternet service provider
Servers, not peopleno
IPv4 addresses2,048
IPv4 ranges4
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

193.53.56.0/22
193.53.54.0/23
193.53.50.0/24
193.53.48.0/24

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

Check an IP address →

Detect it in code

Spot AS21373 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 AS21373

Is AS21373 a datacenter or VPN network?

AS21373 (Banque Nationale de Belgique) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS21373?

AS21373 is registered to Banque Nationale de Belgique. It announces about 2,048 IPv4 addresses.

How do I detect traffic from AS21373?

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.