Autonomous System

AS37917 University of Tsukuba

EducationActiveJapanJPNIC

AS37917 (UTINS) is an education network operated by University of Tsukuba in Japan, registered with JPNIC. It has 3 IPv4 prefixes with 132,096 addresses, which makes it the 1,855th largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses132,096in 3 prefixes
IPv6 prefixes0none
Size rank#1,855of 82,200 active ASNs
Abuser scoreVery Low0.01% of its addresses flagged · method

Details

OrganizationUniversity of Tsukuba
AS nameUTINS
Websitetsukuba.ac.jp
Country Japan (JP)
Network typeEducation
RegistryJPNIC
Abuse contact—
Registered—
Last updated2007-06-11

IPv4 prefixes

3 prefixes · 132,096 addresses
NetworkAddressesFirst – last address
130.158.0.0/1665,536130.158.0.0 – 130.158.255.255
133.51.0.0/1665,536133.51.0.0 – 133.51.255.255
163.220.252.0/221,024163.220.252.0 – 163.220.255.255

IPv6 prefixes

No IPv6 prefixes.

Query AS37917 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=AS37917&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS37917, with or without a key:

curl "https://api.ipapi.is/?q=130.158.0.1"

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