Autonomous System

AS23781 National University Corporation, Toyama University

EducationActiveJapanAPNIC

AS23781 (Toyama-AN-AS) is an education network operated by National University Corporation, Toyama University in Japan, registered with APNIC. It has 4 IPv4 prefixes with 72,704 addresses, which makes it the 2,906th largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses72,704in 4 prefixes
IPv6 prefixes0none
Size rank#2,906of 82,200 active ASNs
Abuser scoreVery Lowunder 0.01% of its addresses flagged · method

Details

OrganizationNational University Corporation, Toyama University
AS nameToyama-AN-AS
Websiteu-toyama.ac.jp
Country Japan (JP)
Network typeEducation
RegistryAPNIC
Abuse contacthostmaster@nic.ad.jp
Registered—
Last updated2024-08-16

IPv4 prefixes

4 prefixes · 72,704 addresses
NetworkAddressesFirst – last address
160.26.0.0/1665,536160.26.0.0 – 160.26.255.255
202.251.144.0/204,096202.251.144.0 – 202.251.159.255
202.254.200.0/212,048202.254.200.0 – 202.254.207.255
202.240.244.0/221,024202.240.244.0 – 202.240.247.255

IPv6 prefixes

No IPv6 prefixes.

Query AS23781 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=AS23781&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS23781, with or without a key:

curl "https://api.ipapi.is/?q=160.26.0.1"

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