Network · AS7509

AS7509 Hokkaido University

AS7509 (Hokkaido University) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS7509

OwnerHokkaido University
KindInternet service provider
Servers, not peopleno
IPv4 addresses131,328
IPv4 ranges3
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

133.87.0.0/16
133.50.0.0/16
192.50.101.0/24

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

Check an IP address →

Detect it in code

Spot AS7509 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 AS7509

Is AS7509 a datacenter or VPN network?

AS7509 (Hokkaido University) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS7509?

AS7509 is registered to Hokkaido University. It announces about 131,328 IPv4 addresses.

How do I detect traffic from AS7509?

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.