Network · AS553

AS553 Universitaet Stuttgart

AS553 (Universitaet Stuttgart) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS553

  • OwnerUniversitaet Stuttgart
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses2,109,696
  • IPv4 ranges51
  • IPv6 ranges17
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 141.68.0.0/15
  • 141.18.0.0/15
  • 193.197.0.0/16
  • 161.42.0.0/16
  • 147.142.0.0/16
  • 144.41.0.0/16
  • 141.87.0.0/16
  • 141.79.0.0/16
  • 141.72.0.0/16
  • 141.70.0.0/16
  • 141.7.0.0/16
  • 141.62.0.0/16

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

Check an IP address →

Detect it in code

Spot AS553 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 AS553

Is AS553 a datacenter or VPN network?

AS553 (Universitaet Stuttgart) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS553?

AS553 is registered to Universitaet Stuttgart. It announces about 2,109,696 IPv4 addresses.

How do I detect traffic from AS553?

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.