Network · AS131584

AS131584 Taiwan Intelligent Fiber Optic Network Co.,Ltd.

AS131584 (Taiwan Intelligent Fiber Optic Network Co.,Ltd.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS131584

OwnerTaiwan Intelligent Fiber Optic Network
KindInternet service provider
Servers, not peopleno
IPv4 addresses41,472
IPv4 ranges21
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

111.235.192.0/18
101.3.32.0/19
210.203.56.0/21
111.125.128.0/21
106.105.176.0/21
101.3.96.0/21
43.255.12.0/22
103.31.196.0/22
103.226.212.0/22
101.3.252.0/22
101.3.0.0/22
101.3.4.0/23

Ranges and owner from DB-IP (CC BY 4.0), updated 2026-10-22.

Check an IP address →

Detect it in code

Spot AS131584 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 AS131584

Is AS131584 a datacenter or VPN network?

AS131584 (Taiwan Intelligent Fiber Optic Network Co.,Ltd.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS131584?

AS131584 is registered to Taiwan Intelligent Fiber Optic Network Co.,Ltd.. It announces about 41,472 IPv4 addresses.

How do I detect traffic from AS131584?

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.