Autonomous system
AS17534 NSK NSK Co.,Ltd.
Unclassified ARIN
Summary
NSK Co.,Ltd.
cable dsl isp residential
The AS handle NSK is held by NSK Co.,Ltd., a Japanese cable and DSL internet service provider.
What it's used for
- The address space carries residential and business access traffic, evidenced by reverse DNS entries such as
kanazawacable.jpandspacelan.ne.jp, alongside internal network operations hosts likenoc.ntt-west.nsk.ne.jp. - The network announces 94,208 IPv4 addresses across 23 prefixes and 2 IPv6 prefixes, while maintaining 29 observed routing neighbours; this ratio of substantial address inventory to a moderate peer count indicates an access network serving end-users rather than a transit provider.
Notable
- Registrants for the largest prefixes are consistently listed as Japan Network Information Center and IRT-JPNIC-JP, which aligns with the announcer as the space is allocated through the national registry.
- The inventory is finely subdivided into 23 distinct IPv4 prefixes, ranging from /18s down to /23s, reflecting a segmented corporate estate for managing different service areas or customer segments.
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 7 exchanges in 4 countries, largest first.
| Exchange | Location | Their address |
|---|---|---|
| AMS-IX Amsterdam | Amsterdam, Netherlands | 80.249.208.238 |
| BroadBand Internet eXchange Tokyo | Tokyo, Japan | 101.203.88.128 |
| JPIX Tokyo | Tokyo, Japan | 210.171.224.195 |
| BroadBand Internet eXchange Singapore | Singapore, Singapore | 103.231.152.144 |
| BroadBand Internet eXchange Osaka | Osaka, Japan | 218.100.9.110 |
| JPIX Osaka | Osaka, Japan | 103.246.232.195 |
| BroadBand Internet eXchange Hong Kong | Hong Kong, China | 103.203.158.144 |
Transit providers
8 upstream, 1 downstream and 14 adjacent networks observed; most-used upstreams first.
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 23 prefixes · 94.21K addresses IPv6 2 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 25 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS17534- Registry name
- NSK
- Abuse contact
- hostmaster@nic.ad.jp
- Registered
- 2000-12-12
- Last changed
- 2011-01-28
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 25 with no ROA
- ROAs
- 0 authorising AS17534
- ASPA
- no ASPA record
- IRR
- 100% registered · 25 of 25 announcements
- Route objects
- 42 naming AS17534
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 1,782 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