AS37900 — MATSURI NTT Communications Corporation

AS37900 announces 3 IPv4 prefixes covering 1,024 addresses and 3 IPv6 prefixes.

About this network

MATSURI is the AS handle for NTT DOCOMO BUSINESS, Inc.

What it's used for

• The address space carries enterprise traffic, evidenced by the netname NTTDOCOMO-JP and registrant NTT DOCOMO Business, Inc across all announced prefixes.
• The AS announces 1024 IPv4 addresses and 3 IPv6 prefixes, with 4 observed neighbours; this low neighbour count relative to the address inventory indicates an internal corporate estate rather than a transit or access network.
• Traffic from this AS consists of office workers and internal business endpoints for NTT DOCOMO's corporate operations.

Notable

• Registrants agree with the announcer, with all prefixes registered to NTT DOCOMO Business, Inc under the netname NTTDOCOMO-JP.
• The address inventory is finely subdivided into three IPv4 prefixes and three IPv6 /48s, consistent with site-by-site segmentation for a large corporate entity.

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

Announced prefixes

• 202.2.89.0/24
• 202.2.91.0/24
• 202.4.244.0/23
• 2402:c800:fff1::/48
• 2402:c800:fff3::/48
• 2402:c800:fff6::/48

Upstream networks

• AS2516 KDDI CORPORATION
• AS4713 NTT DOCOMO BUSINESS,Inc.
• AS2914 NTT America, Inc.
• AS17676 SoftBank Corp.

Adjacent networks

• AS2516 KDDI CORPORATION
• AS4713 NTT DOCOMO BUSINESS,Inc.
• AS2914 NTT America, Inc.
• AS17676 SoftBank Corp.

Routing security

• RPKI: 7 valid, 0 invalid and 0 not-found announcements; 3 ROAs.
• ASPA: none published.
• IRR: 29% of announcements registered; 8 route objects.
• Listed in as-sets: AS-GIGAINFRA, AS-HANABI4-MDDOS, AS-HIGE, AS-HURRICANEV6, AS-IIJ, AS-IIJ6, AS-KDD, AS-KDDCUSTOMER2, AS-KDDI6, AS-MATSURI, AS-MHDD, AS-OCN, AS-OCN, AS-OCN-V6, AS-OCN-V6, AS-PACNET-DOWNSTREAM-JP, AS2497:AS-IIJ, AS2497:AS-IIJ6.