AS23641 — NSCS-NET NS Computer Service Corporation

AS23641 announces 2 IPv4 prefixes covering 6,144 addresses and 1 IPv6 prefixes.

About this network

NSCS-NET is the AS handle for NS Computer Service Corporation, a Japanese network service provider.

What it's used for

• The address space carries residential user traffic, evidenced by reverse DNS entries like usr254.g027.nabic.jp and usr254.g229.nabic.jp.
• The AS announces 6144 IPv4 addresses across 2 prefixes and 1 IPv6 prefix, while maintaining 10 observed neighbours; this ratio of address space to peering partners indicates an access or eyeball network role.

Notable

• The registrants for both announced IPv4 prefixes are listed as Japan Network Information Center (JPNIC) with the netname NSCS-NET-CIDR-BLK-JP, which is consistent with the AS holder's identity.
• The address inventory consists of two distinct IPv4 blocks, 211.19.16.0/20 and 203.86.224.0/21, alongside a single IPv6 prefix 2403:9200::/32.

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

Announced prefixes

• 203.86.224.0/21
• 211.19.16.0/20
• 2403:9200::/32

Upstream networks

• AS2914 NTT America, Inc.
• AS9002 RETN Limited
• AS24482 SG.GS
• AS9304 HGC Global Communications Limited

Adjacent networks

• AS2914 NTT America, Inc.
• AS9002 RETN Limited
• AS24482 SG.GS
• AS9304 HGC Global Communications Limited

Internet exchanges

• BroadBand Internet eXchange Tokyo — Tokyo, Japan
• Echigo Internet Exchange — Niigata, Japan