AS17534 — NSK NSK Co.,Ltd.

AS17534 announces 23 IPv4 prefixes covering 94,208 addresses and 2 IPv6 prefixes.

About this network

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.jp and spacelan.ne.jp, alongside internal network operations hosts like noc.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.

Announced prefixes

• 14.102.132.0/22
• 27.131.224.0/20
• 61.198.64.0/19
• 61.213.208.0/20
• 103.3.184.0/22
• 113.20.152.0/22
• 113.21.48.0/20
• 114.142.176.0/20
• 119.18.160.0/20
• 119.18.176.0/21
• 124.110.210.0/23
• 124.110.212.0/22
• 124.110.216.0/21
• 133.88.64.0/21
• 133.165.192.0/18
• 202.122.48.0/20
• 203.196.64.0/20
• 203.196.80.0/21
• 210.131.224.0/21
• 210.131.232.0/22
• 210.171.64.0/23
• 219.99.192.0/19
• 221.133.64.0/18
• 2405:a200::/32
• 2406:f200::/32

Upstream networks

• AS2519 ARTERIA Networks Corporation
• AS2914 NTT America, Inc.
• AS6939 Hurricane Electric LLC
• AS17676 SoftBank Corp.
• AS24482 SG.GS
• AS9304 HGC Global Communications Limited
• AS9824 JCOM Co., Ltd.

Downstream networks

• AS7668 Hokuriku Telecommunication Network Co.

Adjacent networks

• AS2519 ARTERIA Networks Corporation
• AS2914 NTT America, Inc.
• AS6939 Hurricane Electric LLC
• AS17676 SoftBank Corp.
• AS24482 SG.GS
• AS9304 HGC Global Communications Limited
• AS9824 JCOM Co., Ltd.
• AS7668 Hokuriku Telecommunication Network Co.

Internet exchanges

• AMS-IX Amsterdam — Amsterdam, Netherlands
• BroadBand Internet eXchange Tokyo — Tokyo, Japan
• JPIX Tokyo — Tokyo, Japan
• BroadBand Internet eXchange Singapore — Singapore, Singapore
• BroadBand Internet eXchange Osaka — Osaka, Japan
• JPIX Osaka — Osaka, Japan
• BroadBand Internet eXchange Hong Kong — Hong Kong, China