Network · AS399256

AS399256 Fontana Unified School District

AS399256 (Fontana Unified School District) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS399256

  • OwnerFontana Unified School District
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses512
  • IPv4 ranges1
  • IPv6 ranges0
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 208.64.34.0/23

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

Check an IP address →

Detect it in code

Spot AS399256 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 AS399256

Is AS399256 a datacenter or VPN network?

AS399256 (Fontana Unified School District) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS399256?

AS399256 is registered to Fontana Unified School District. It announces about 512 IPv4 addresses.

How do I detect traffic from AS399256?

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.