Network · AS23983

AS23983 Daejeon University

AS23983 (Daejeon University) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS23983

OwnerDaejeon University
KindInternet service provider
Servers, not peopleno
IPv4 addresses6,656
IPv4 ranges3
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

203.237.128.0/20
203.237.144.0/21
203.237.152.0/23

Ranges and owner from DB-IP (CC BY 4.0), updated 2026-10-22.

Check an IP address →

Detect it in code

Spot AS23983 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 AS23983

Is AS23983 a datacenter or VPN network?

AS23983 (Daejeon University) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS23983?

AS23983 is registered to Daejeon University. It announces about 6,656 IPv4 addresses.

How do I detect traffic from AS23983?

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.