Network · AS204004

AS204004 Number One in Fiber S.L.

AS204004 (Number One in Fiber S.L.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS204004

  • OwnerNumber One in Fiber S.L.
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses3,328
  • IPv4 ranges6
  • IPv6 ranges0
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 5.59.80.0/22
  • 185.107.16.0/22
  • 92.246.80.0/23
  • 77.241.58.0/24
  • 185.117.44.0/24
  • 176.222.69.0/24

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

Check an IP address →

Detect it in code

Spot AS204004 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 AS204004

Is AS204004 a datacenter or VPN network?

AS204004 (Number One in Fiber S.L.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS204004?

AS204004 is registered to Number One in Fiber S.L.. It announces about 3,328 IPv4 addresses.

How do I detect traffic from AS204004?

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.