Autonomous System
AS4693 CSK-IT MANAGEMENT CORPORATION
BusinessActiveJapanJPNIC
AS4693 (CSK) is a business network operated by CSK-IT MANAGEMENT CORPORATION in Japan, registered with JPNIC. It has 7 IPv4 prefixes with 45,056 addresses and 1 IPv6 prefix, which makes it the 4,524th largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses45,056in 7 prefixes
IPv6 prefixes1≈ 7.9 × 10²⁸ addresses
Size rank#4,524of 82,200 active ASNs
Details
OrganizationCSK-IT MANAGEMENT CORPORATION
AS nameCSK
Website—
Country Japan (JP)
Network typeBusiness
RegistryJPNIC
Abuse contact—
Registered—
Last updated2010-02-05
IPv4 prefixes
7 prefixes · 45,056 addresses| Network | Addresses | First – last address |
|---|---|---|
| 203.140.0.0/19 | 8,192 | 203.140.0.0 – 203.140.31.255 |
| 203.179.32.0/19 | 8,192 | 203.179.32.0 – 203.179.63.255 |
| 210.159.96.0/19 | 8,192 | 210.159.96.0 – 210.159.127.255 |
| 210.166.96.0/19 | 8,192 | 210.166.96.0 – 210.166.127.255 |
| 210.249.192.0/19 | 8,192 | 210.249.192.0 – 210.249.223.255 |
| 211.7.192.0/21 | 2,048 | 211.7.192.0 – 211.7.199.255 |
| 211.7.208.0/21 | 2,048 | 211.7.208.0 – 211.7.215.255 |
203.140.0.0/19 203.179.32.0/19 210.159.96.0/19 210.166.96.0/19 210.249.192.0/19 211.7.192.0/21 211.7.208.0/21
IPv6 prefixes
1 prefix- 2400:af80::/32
2400:af80::/32
Query AS4693 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=AS4693&key=YOUR_API_KEY"Any address in its prefixes resolves to AS4693, with or without a key:
curl "https://api.ipapi.is/?q=203.140.0.1"Largest networks in Japan
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