AS23631 — KISNET Sofu System, Inc

AS23631 announces 2 IPv4 prefixes covering 6,144 addresses and 1 IPv6 prefixes.

About this network

AS23631 is operated by Sofu System, Inc.

What it's used for

• The address space carries corporate infrastructure, indicated by netnames SoFu-System-CIDR-BLK-JP and NIIT-NET-CIDR-BLK-JP.
• The AS announces 6144 IPv4 addresses across 2 prefixes and 1 IPv6 prefix, with only 1 observed neighbour, implying a small, self-contained business network rather than a transit or large access provider.

Notable

• Registrants for both IPv4 prefixes are listed as Japan Network Information Center, which is consistent with the Japanese registry allocation for the holder.
• The address inventory consists of two distinct IPv4 blocks and one IPv6 /32, representing a modest internal estate for a software development company based in Niigata, Japan.

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

Announced prefixes

• 202.243.120.0/21
• 210.236.208.0/20
• 2402:b300::/32

Upstream networks

• AS18070 Global Network Core Co.,Ltd.

Adjacent networks

• AS18070 Global Network Core Co.,Ltd.

Internet exchanges

• Echigo Internet Exchange — Niigata, Japan