Network · AS28933

AS28933 University of Ljubljana, Faculty of Electrical Engineering

AS28933 (University of Ljubljana, Faculty of Electrical Engineering) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS28933

  • OwnerUniversity of Ljubljana, Faculty of El
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses16,640
  • IPv4 ranges2
  • IPv6 ranges1
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 212.101.128.0/18
  • 195.47.197.0/24

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

Check an IP address →

Detect it in code

Spot AS28933 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 AS28933

Is AS28933 a datacenter or VPN network?

AS28933 (University of Ljubljana, Faculty of Electrical Engineering) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS28933?

AS28933 is registered to University of Ljubljana, Faculty of Electrical Engineering. It announces about 16,640 IPv4 addresses.

How do I detect traffic from AS28933?

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.