AS24291 — MITSUI-NW MITSUI & CO., LTD.

AS24291 announces 2 IPv4 prefixes covering 768 addresses and 0 IPv6 prefixes.

About this network

MITSUI-NW is the autonomous system for Mitsui & Co., Ltd., a major Japanese trading house.

What it's used for

• The address space carries internal corporate infrastructure, evidenced by the reverse DNS record mbk-as-202-4-248-128.mitsui.co.jp and netnames MITSUI-NW-CIDR-BLK-JP and JAPAN150.
• The AS announces 768 IPv4 addresses across 2 prefixes with only 2 observed neighbours, a ratio indicating a small, self-contained internal network rather than a transit or access provider.

Notable

• Registrants for both prefixes are listed as Japan Network Information Center and IRT-JPNIC-JP, which is standard for Japanese allocations and consistent with the announcer's identity.
• The inventory consists of two distinct blocks: a /23 (202.4.248.0/23) and a /24 (150.56.0.0/24), representing a modest footprint typical of a large corporation's internal estate.

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

Announced prefixes

• 150.56.0.0/24
• 202.4.248.0/23

Upstream networks

• AS8220 COLT Technology Services Group Limited
• AS24295 PacketFabric (Japan) Co., Ltd.

Adjacent networks

• AS8220 COLT Technology Services Group Limited
• AS24295 PacketFabric (Japan) Co., Ltd.

Routing security

• RPKI: 0 valid, 0 invalid and 4 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 4 route objects.
• Listed in as-sets: AS-GIGAINFRA, AS-IIJ, AS-IIJ6, AS-KDD, AS-KDDI6, AS-OCN, AS-OCN, AS-PNAPOSK001, AS2497:AS-IIJ, AS2497:AS-IIJ6, AS8220:AS-COLTJP.