Network · AS55618

AS55618 UNIVERSITY OF ULSAN

AS55618 (UNIVERSITY OF ULSAN) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS55618

OwnerUNIVERSITY OF ULSAN
KindInternet service provider
Servers, not peopleno
IPv4 addresses16,896
IPv4 ranges7
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

203.250.64.0/19
210.102.208.0/21
210.102.160.0/21
210.102.152.0/21
210.102.216.0/22
210.102.168.0/22
218.147.40.0/23

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

Check an IP address →

Detect it in code

Spot AS55618 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 AS55618

Is AS55618 a datacenter or VPN network?

AS55618 (UNIVERSITY OF ULSAN) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS55618?

AS55618 is registered to UNIVERSITY OF ULSAN. It announces about 16,896 IPv4 addresses.

How do I detect traffic from AS55618?

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.