Network · AS239

AS239 University of Toronto

AS239 (University of Toronto) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS239

OwnerUniversity of Toronto
KindInternet service provider
Servers, not peopleno
IPv4 addresses331,264
IPv4 ranges8
IPv6 ranges2

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

142.150.0.0/15
142.1.0.0/16
138.51.0.0/16
128.100.0.0/16
192.12.176.0/21
192.82.128.0/22
192.75.254.0/24
192.12.174.0/24

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

Check an IP address →

Detect it in code

Spot AS239 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 AS239

Is AS239 a datacenter or VPN network?

AS239 (University of Toronto) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS239?

AS239 is registered to University of Toronto. It announces about 331,264 IPv4 addresses.

How do I detect traffic from AS239?

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.