Network · AS203885

AS203885 SNCF

AS203885 (SNCF) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS203885

  • OwnerSNCF
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses2,816
  • IPv4 ranges10
  • IPv6 ranges0
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 171.16.206.0/23
  • 171.16.210.0/24
  • 171.16.208.0/24
  • 171.16.205.0/24
  • 171.16.200.0/24
  • 148.169.40.0/24
  • 148.169.23.0/24
  • 148.169.18.0/24
  • 148.169.17.0/24
  • 148.169.134.0/24

Ranges and owner from DB-IP (CC BY 4.0), updated 2026-10-22.

Check an IP address →

Detect it in code

Spot AS203885 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 AS203885

Is AS203885 a datacenter or VPN network?

AS203885 (SNCF) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS203885?

AS203885 is registered to SNCF. It announces about 2,816 IPv4 addresses.

How do I detect traffic from AS203885?

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.