Autonomous system
AS17680 SCS - SCSK Corporation
Unclassified APNIC
Summary
SCSK Corporation
business japan enterprise
SCS is the autonomous system for SCSK Corporation.
What it's used for
- The space carries corporate infrastructure, indicated by the netname
SCS-CIDR-BLK-JPon the 110.50.24.0/21 prefix. - With 6144 IPv4 addresses announced across 2 prefixes and only 1 observed neighbour, the inventory suggests an internal corporate estate rather than a transit or access network.
Notable
- Registrants for both prefixes are listed as Japan Network Information Center (JPNIC), which is consistent with JPNIC managing the allocation for the holder.
- The address inventory consists of two distinct IPv4 blocks: 61.213.48.0/20 and 110.50.24.0/21, with no IPv6 prefixes in the inventory.
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
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Transit providers
1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS4693 | CSK-IT MANAGEMENT CORPORATION | 120 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-01, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 6.14K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 2 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS17680- Registry name
- SCS
- Abuse contact
- hostmaster@nic.ad.jp
- Registered
- 2001-03-26
- Last changed
- 2012-04-12
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 2 with no ROA
- ROAs
- 0 authorising AS17680
- ASPA
- no ASPA record
- IRR
- 100% registered · 2 of 2 announcements
- Route objects
- 4 naming AS17680
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: 447 networks and 1,843 prefixes, as published 2026-11-02. 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