Network · AS18220

AS18220 Australian Defence Organisation

AS18220 (Australian Defence Organisation) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS18220

OwnerAustralian Defence Organisation
KindInternet service provider
Servers, not peopleno
IPv4 addresses2,816
IPv4 ranges5
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

203.6.104.0/22
203.6.100.0/22
203.6.114.0/24
203.10.114.0/24
202.12.69.0/24

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

Check an IP address →

Detect it in code

Spot AS18220 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 AS18220

Is AS18220 a datacenter or VPN network?

AS18220 (Australian Defence Organisation) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS18220?

AS18220 is registered to Australian Defence Organisation. It announces about 2,816 IPv4 addresses.

How do I detect traffic from AS18220?

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.