Autonomous System

AS23623 Chuo University

EducationActiveJapanAPNIC

AS23623 (CHUO-U) is an education network operated by Chuo University in Japan, registered with APNIC. It has 1 IPv4 prefix with 65,536 addresses, which makes it the 3,730th largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses65,536in 1 prefix
IPv6 prefixes0none
Size rank#3,730of 82,200 active ASNs
Abuser scoreVery Lowunder 0.01% of its addresses flagged · method

Details

OrganizationChuo University
AS nameCHUO-U
Websitechuo-u.ac.jp
Country Japan (JP)
Network typeEducation
RegistryAPNIC
Abuse contacthostmaster@nic.ad.jp
Registered—
Last updated2024-08-13

IPv4 prefixes

1 prefix · 65,536 addresses
NetworkAddressesFirst – last address
133.91.0.0/1665,536133.91.0.0 – 133.91.255.255

IPv6 prefixes

No IPv6 prefixes.

Query AS23623 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=AS23623&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS23623, with or without a key:

curl "https://api.ipapi.is/?q=133.91.0.1"

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