Network · AS20133

AS20133 CASS INFORMATION SYSTEMS

AS20133 (CASS INFORMATION SYSTEMS) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS20133

OwnerCASS INFORMATION SYSTEMS
KindInternet service provider
Servers, not peopleno
IPv4 addresses256
IPv4 ranges1
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

12.109.109.0/24

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

Check an IP address →

Detect it in code

Spot AS20133 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 AS20133

Is AS20133 a datacenter or VPN network?

AS20133 (CASS INFORMATION SYSTEMS) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS20133?

AS20133 is registered to CASS INFORMATION SYSTEMS. It announces about 256 IPv4 addresses.

How do I detect traffic from AS20133?

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.