Network · AS1659

AS1659 Taiwan Academic Network (TANet) Information Center

AS1659 (Taiwan Academic Network (TANet) Information Center) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS1659

OwnerTaiwan Academic Network (TANet) Inform
KindInternet service provider
Servers, not peopleno
IPv4 addresses5,495,296
IPv4 ranges103
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

140.120.0.0/13
120.112.0.0/13
163.24.0.0/14
163.20.0.0/14
140.132.0.0/14
120.120.0.0/14
120.108.0.0/14
120.100.0.0/14
163.30.0.0/15
163.16.0.0/15
163.14.0.0/15
140.130.0.0/15

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

Check an IP address →

Detect it in code

Spot AS1659 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 AS1659

Is AS1659 a datacenter or VPN network?

AS1659 (Taiwan Academic Network (TANet) Information Center) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS1659?

AS1659 is registered to Taiwan Academic Network (TANet) Information Center. It announces about 5,495,296 IPv4 addresses.

How do I detect traffic from AS1659?

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.