Autonomous System

AS18420 National Central University

EducationActiveTaiwanAPNIC

AS18420 (NCU-TW) is an education network operated by National Central University in Taiwan, registered with APNIC. It has 1 IPv4 prefix with 65,536 addresses, which makes it the 3,688th largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses65,536in 1 prefix
IPv6 prefixes0none
Size rank#3,688of 82,200 active ASNs
Abuser scoreVery Low0.04% of its addresses flagged · method

Details

OrganizationNational Central University
AS nameNCU-TW
Websitencu.edu.tw
Country Taiwan (TW)
Network typeEducation
RegistryAPNIC
Abuse contactnoc@mail.moe.gov.tw
Registered—
Last updated2025-11-06

IPv4 prefixes

1 prefix · 65,536 addresses
NetworkAddressesFirst – last address
140.115.0.0/1665,536140.115.0.0 – 140.115.255.255

IPv6 prefixes

No IPv6 prefixes.

Query AS18420 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=AS18420&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS18420, with or without a key:

curl "https://api.ipapi.is/?q=140.115.0.1"

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