Network · AS3839

AS3839 Chulalongkorn University

AS3839 (Chulalongkorn University) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS3839

OwnerChulalongkorn University
KindInternet service provider
Servers, not peopleno
IPv4 addresses66,048
IPv4 ranges3
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

161.200.0.0/16
202.6.90.0/24
192.207.64.0/24

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

Check an IP address →

Detect it in code

Spot AS3839 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 AS3839

Is AS3839 a datacenter or VPN network?

AS3839 (Chulalongkorn University) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS3839?

AS3839 is registered to Chulalongkorn University. It announces about 66,048 IPv4 addresses.

How do I detect traffic from AS3839?

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.