Network · AS45581

AS45581 Infonet Thailand

AS45581 (Infonet Thailand) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS45581

OwnerInfonet Thailand
KindInternet service provider
Servers, not peopleno
IPv4 addresses1,280
IPv4 ranges5
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

203.33.240.0/24
203.26.168.0/24
103.82.165.0/24
103.246.50.0/24
103.17.249.0/24

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

Check an IP address →

Detect it in code

Spot AS45581 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 AS45581

Is AS45581 a datacenter or VPN network?

AS45581 (Infonet Thailand) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS45581?

AS45581 is registered to Infonet Thailand. It announces about 1,280 IPv4 addresses.

How do I detect traffic from AS45581?

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.