AS4693 — CSK CSK-IT MANAGEMENT CORPORATION

AS4693 announces 7 IPv4 prefixes covering 45,056 addresses and 1 IPv6 prefixes.

About this network

CSK — registered to CSK-IT Management Corporation, a Japanese IT services company from the CSK group.

What it's used for

• Corporate networking and IT infrastructure / outsourcing services for Japanese business customers.

Notable

• CSK Corporation, founded in 1968, was one of Japan's major independent software and IT-services houses. It was acquired by Sumitomo Corporation and merged into what is now SCSK Corporation in 2011, so the CSK name survives here mainly as a registry artifact.
• The registration has not been substantially refreshed in many years; treat the organisation name as historical and the space as enterprise IT infrastructure.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 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
• 2400:af80::/32

Upstream networks

• AS17686 ACCELIA
• AS17676 SoftBank Corp.
• AS6939 Hurricane Electric LLC
• AS17639 Converge ICT Solutions Inc.
• AS24482 SG.GS
• AS20485 Joint Stock Company TransTeleCom

Downstream networks

• AS17680 SCSK Corporation

Adjacent networks

• AS17686 ACCELIA
• AS17676 SoftBank Corp.
• AS17680 SCSK Corporation
• AS6939 Hurricane Electric LLC
• AS24482 SG.GS
• AS17639 Converge ICT Solutions Inc.
• AS20485 Joint Stock Company TransTeleCom
• AS9002 RETN Limited

Internet exchanges

• BroadBand Internet eXchange Tokyo — Tokyo, Japan
• JPIX Tokyo — Tokyo, Japan
• Network Service Provider IXP (Distributed IX in Edo) — Tokyo, Japan