Network · AS203993

AS203993 S.J.M. Steffann

AS203993 (S.J.M. Steffann) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS203993

OwnerS.J.M. Steffann
KindInternet service provider
Servers, not peopleno
IPv4 addresses1,280
IPv4 ranges3
IPv6 ranges2

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

67.221.252.0/23
185.54.92.0/23
67.221.255.0/24

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

Check an IP address →

Detect it in code

Spot AS203993 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 AS203993

Is AS203993 a datacenter or VPN network?

AS203993 (S.J.M. Steffann) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS203993?

AS203993 is registered to S.J.M. Steffann. It announces about 1,280 IPv4 addresses.

How do I detect traffic from AS203993?

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.