Network · AS203273

AS203273 NetCrafters OU

AS203273 (NetCrafters OU) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS203273

  • OwnerNetCrafters OU
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses35,584
  • IPv4 ranges88
  • IPv6 ranges4
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 91.186.216.0/22
  • 83.147.252.0/22
  • 77.110.124.0/22
  • 62.60.248.0/22
  • 62.60.244.0/22
  • 213.176.92.0/22
  • 213.176.116.0/22
  • 2.56.120.0/22
  • 185.173.144.0/22
  • 171.22.128.0/22
  • 94.228.166.0/23
  • 94.228.160.0/23

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

Check an IP address →

Detect it in code

Spot AS203273 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 AS203273

Is AS203273 a datacenter or VPN network?

AS203273 (NetCrafters OU) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS203273?

AS203273 is registered to NetCrafters OU. It announces about 35,584 IPv4 addresses.

How do I detect traffic from AS203273?

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.