Network · AS4729

AS4729 Japan Atomic Energy Agency

AS4729 (Japan Atomic Energy Agency) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS4729

OwnerJapan Atomic Energy Agency
KindInternet service provider
Servers, not peopleno
IPv4 addresses131,072
IPv4 ranges2
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

133.53.0.0/16
133.188.0.0/16

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

Check an IP address →

Detect it in code

Spot AS4729 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 AS4729

Is AS4729 a datacenter or VPN network?

AS4729 (Japan Atomic Energy Agency) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS4729?

AS4729 is registered to Japan Atomic Energy Agency. It announces about 131,072 IPv4 addresses.

How do I detect traffic from AS4729?

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.