Network · AS5603

AS5603 Telekom Slovenije, d.d.

AS5603 (Telekom Slovenije, d.d.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS5603

OwnerTelekom Slovenije, d.d.
KindInternet service provider
Servers, not peopleno
IPv4 addresses781,568
IPv4 ranges39
IPv6 ranges21

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

188.196.0.0/14
89.142.0.0/15
178.58.0.0/16
109.182.0.0/16
95.176.128.0/17
86.61.0.0/17
193.77.128.0/17
95.159.192.0/18
213.250.0.0/18
195.210.192.0/18
193.95.192.0/18
193.77.64.0/18

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

Check an IP address →

Detect it in code

Spot AS5603 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 AS5603

Is AS5603 a datacenter or VPN network?

AS5603 (Telekom Slovenije, d.d.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS5603?

AS5603 is registered to Telekom Slovenije, d.d.. It announces about 781,568 IPv4 addresses.

How do I detect traffic from AS5603?

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.