Autonomous System

AS24278 USEN CORPORATION

ISPActiveJapanAPNIC

AS24278 (USEN-NET) is an ISP network operated by USEN CORPORATION in Japan, registered with APNIC. It has 2 IPv4 prefixes with 20,480 addresses and 1 IPv6 prefix, which makes it the 6,765th largest of 82,200 active autonomous systems by IPv4 space.

IPv4 addresses20,480in 2 prefixes
IPv6 prefixes1≈ 7.9 × 10²⁸ addresses
Size rank#6,765of 82,200 active ASNs
Abuser scoreVery Lowunder 0.01% of its addresses flagged · method

Details

OrganizationUSEN CORPORATION
AS nameUSEN-NET
Websiteusen.com
Country Japan (JP)
Network typeISP
RegistryAPNIC
Abuse contacthostmaster@nic.ad.jp
Registered—
Last updated2024-08-14

IPv4 prefixes

2 prefixes · 20,480 addresses
NetworkAddressesFirst – last address
118.238.128.0/1816,384118.238.128.0 – 118.238.191.255
125.63.32.0/204,096125.63.32.0 – 125.63.47.255

IPv6 prefixes

1 prefix
  • 2400:f400::/32

Query AS24278 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=AS24278&key=YOUR_API_KEY"

Any address in its prefixes resolves to AS24278, with or without a key:

curl "https://api.ipapi.is/?q=118.238.128.1"

Largest networks in Japan

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