Autonomous System

AS1659 This aut-num object created as part of

GovernmentActiveTaiwanAPNIC

AS1659 (ERX-TANET-ASN1) is a government network operated by This aut-num object created as part of in Taiwan, registered with APNIC. It has 223 IPv4 prefixes with 6,637,824 addresses and 1 IPv6 prefix, which makes it the 105th largest of 82,534 active autonomous systems by IPv4 space.

IPv4 addresses6,637,824in 223 prefixes
IPv6 prefixes1≈ 7.9 × 10²⁸ addresses
Size rank#105of 82,534 active ASNs
Abuser scoreVery Low0.01% of its addresses flagged · method

Details

OrganizationThis aut-num object created as part of
AS nameERX-TANET-ASN1
Websitemoe.gov.tw
Country Taiwan (TW)
Network typeGovernment
RegistryAPNIC
Abuse contactnoc@mail.moe.gov.tw
Registered—
Last updated2025-11-06

IPv4 prefixes

223 prefixes · 6,637,824 addresses
NetworkAddressesFirst – last address
120.96.0.0/112,097,152120.96.0.0 – 120.127.255.255
140.112.0.0/121,048,576140.112.0.0 – 140.127.255.255
140.128.0.0/13524,288140.128.0.0 – 140.135.255.255
163.16.0.0/13524,288163.16.0.0 – 163.23.255.255
163.24.0.0/14262,144163.24.0.0 – 163.27.255.255
140.110.0.0/15131,072140.110.0.0 – 140.111.255.255
140.136.0.0/15131,072140.136.0.0 – 140.137.255.255
163.14.0.0/15131,072163.14.0.0 – 163.15.255.255
163.30.0.0/15131,072163.30.0.0 – 163.31.255.255
134.208.0.0/1665,536134.208.0.0 – 134.208.255.255
140.92.0.0/1665,536140.92.0.0 – 140.92.255.255
140.120.0.0/1665,536140.120.0.0 – 140.120.255.255
140.125.0.0/1665,536140.125.0.0 – 140.125.255.255
140.134.0.0/1665,536140.134.0.0 – 140.134.255.255
140.138.0.0/1665,536140.138.0.0 – 140.138.255.255
163.13.0.0/1665,536163.13.0.0 – 163.13.255.255
163.28.0.0/1665,536163.28.0.0 – 163.28.255.255
163.32.0.0/1665,536163.32.0.0 – 163.32.255.255
192.192.0.0/1665,536192.192.0.0 – 192.192.255.255
203.64.0.0/1665,536203.64.0.0 – 203.64.255.255
203.68.0.0/1665,536203.68.0.0 – 203.68.255.255
203.71.0.0/1665,536203.71.0.0 – 203.71.255.255
203.72.0.0/1665,536203.72.0.0 – 203.72.255.255
210.60.0.0/1665,536210.60.0.0 – 210.60.255.255
210.70.0.0/1665,536210.70.0.0 – 210.70.255.255
The 25 largest of 223. The API and the database have all of them.

IPv6 prefixes

1 prefix
  • 2001:288::/32

Query AS1659 with the API

The ASN lookup returns everything on this page as JSON, including every prefix. ASN lookups need an API key: a free account comes with 1,000 requests a day. 

curl "https://api.ipapi.is/?q=AS1659&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS1659, with or without a key:

curl "https://api.ipapi.is/?q=120.96.0.1"

Largest networks in Taiwan

AS3462 Chunghwa Telecom Co., Ltd.16,359,936 IPv4 addressesAS4780 Digital United Inc.5,164,032 IPv4 addressesAS9924 Taiwan Fixed Network CO.,LTD.4,313,600 IPv4 addressesAS9919 New Century InfoComm Tech Co., Ltd.3,128,576 IPv4 addressesAS9674 Far EastTone Telecommunication Co., Ltd.2,298,624 IPv4 addressesAS17421 Mobile Business Group1,689,600 IPv4 addresses