Autonomous System

AS38635 Keio University

EducationActiveJapanJPNIC

AS38635 (KEIO-NET) is an education network operated by Keio University in Japan, registered with JPNIC. It has 2 IPv4 prefixes with 131,072 addresses and 2 IPv6 prefixes, which makes it the 1,953rd largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses131,072in 2 prefixes
IPv6 prefixes2≈ 2.4 × 10²⁴ addresses
Size rank#1,953of 82,200 active ASNs
Abuser scoreVery Lowunder 0.01% of its addresses flagged · method

Details

OrganizationKeio University
AS nameKEIO-NET
Websitekeio.ac.jp
Country Japan (JP)
Network typeEducation
RegistryJPNIC
Abuse contact—
Registered—
Last updated2012-03-11

IPv4 prefixes

2 prefixes · 131,072 addresses
NetworkAddressesFirst – last address
131.113.0.0/1665,536131.113.0.0 – 131.113.255.255
133.27.0.0/1665,536133.27.0.0 – 133.27.255.255

IPv6 prefixes

2 prefixes
  • 2001:df0:eb::/48
  • 2001:df2:c900::/48

Query AS38635 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=AS38635&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS38635, with or without a key:

curl "https://api.ipapi.is/?q=131.113.0.1"

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