Network · AS45400

AS45400 Korea Telecom

AS45400 (Korea Telecom) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS45400

  • OwnerKorea Telecom
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses25,856
  • IPv4 ranges83
  • IPv6 ranges0
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 210.104.8.0/21
  • 211.46.92.0/22
  • 211.34.114.0/23
  • 211.185.244.0/23
  • 210.99.158.0/23
  • 210.204.226.0/23
  • 210.179.218.0/23
  • 210.179.140.0/23
  • 210.104.26.0/23
  • 180.92.250.0/23
  • 221.145.178.0/24
  • 211.57.43.0/24

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

Check an IP address →

Detect it in code

Spot AS45400 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 AS45400

Is AS45400 a datacenter or VPN network?

AS45400 (Korea Telecom) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS45400?

AS45400 is registered to Korea Telecom. It announces about 25,856 IPv4 addresses.

How do I detect traffic from AS45400?

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.