Autonomous system
AS4693 CSK CSK-IT MANAGEMENT CORPORATION
Unclassified APNIC NSP
Summary
CSK-IT Management Corporation
enterprise legacy
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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 3 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| BroadBand Internet eXchange Tokyo | Tokyo, Japan | 101.203.89.43 |
| JPIX Tokyo | Tokyo, Japan | 210.171.224.100 |
| Network Service Provider IXP (Distributed IX in Edo) | Tokyo, Japan | 202.249.2.76 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-15, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 7 prefixes · 45.06K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 8 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS4693- Registry name
- CSK
- Registered
- 1995-08-30
- Last changed
- 2010-02-05
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- SCSK Corporation
- Network type
- NSP
- Scope
- Asia Pacific
- Traffic ratio
- Mostly Outbound
- Peering policy
- Open
- Present at
- 3 exchanges
- Facilities
- 2 facilities
- Website
- https://www.scsk.jp/index_en.html
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 8 with no ROA
- ROAs
- 0 authorising AS4693
- ASPA
- no ASPA record
- IRR
- 100% registered · 8 of 8 announcements
- Route objects
- 8 naming AS4693
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 442 networks and 1,781 prefixes, as published 2026-10-16. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere