Network · AS9858

AS9858 Korea Internet Security Agency

AS9858 (Korea Internet Security Agency) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS9858

OwnerKorea Internet Security Agency
KindInternet service provider
Servers, not peopleno
IPv4 addresses4,864
IPv4 ranges11
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

49.8.8.0/21
49.8.18.0/23
49.8.4.0/24
49.8.21.0/24
49.8.2.0/24
49.8.16.0/24
49.8.0.0/24
49.11.0.0/24
202.20.85.0/24
192.132.15.0/24
110.92.23.0/24

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

Check an IP address →

Detect it in code

Spot AS9858 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 AS9858

Is AS9858 a datacenter or VPN network?

AS9858 (Korea Internet Security Agency) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS9858?

AS9858 is registered to Korea Internet Security Agency. It announces about 4,864 IPv4 addresses.

How do I detect traffic from AS9858?

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.