Autonomous System

AS55390 Tokyo University of Science

EducationActiveJapanJPNIC

AS55390 (TUSNET) is an education network operated by Tokyo University of Science in Japan, registered with JPNIC. It has 3 IPv4 prefixes with 131,072 addresses and 1 IPv6 prefix, which makes it the 1,960th largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses131,072in 3 prefixes
IPv6 prefixes1≈ 1.2 × 10²⁴ addresses
Size rank#1,960of 82,200 active ASNs
Abuser scoreVery Lowunder 0.01% of its addresses flagged · method

Details

OrganizationTokyo University of Science
AS nameTUSNET
Websitetus.ac.jp
Country Japan (JP)
Network typeEducation
RegistryJPNIC
Abuse contact—
Registered—
Last updated2022-05-11

IPv4 prefixes

3 prefixes · 131,072 addresses
NetworkAddressesFirst – last address
133.31.0.0/1665,536133.31.0.0 – 133.31.255.255
133.31.0.0/1732,768133.31.0.0 – 133.31.127.255
133.31.128.0/1732,768133.31.128.0 – 133.31.255.255

IPv6 prefixes

1 prefix
  • 2001:df0:cf::/48

Query AS55390 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=AS55390&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS55390, with or without a key:

curl "https://api.ipapi.is/?q=133.31.0.1"

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