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AS37900
AS37900 NTT DOCOMO BUSINESS, Inc.
MATSURI - NTT DOCOMO BUSINESS, Inc. · registered in Japan
IPv4 addresses 1,024 3 prefixes · <0.001% of announced IPv4
Rank in Japan #537 largest network in JP by IPv4 space, of 724 · <0.01% of JP
Rank worldwide #35,581 of 79,396 networks with IPv4
IPv6 3 x /48 3 prefixes
Country Japan 745 ASNs registered there
IPv4 prefixes
All 3 prefixes, in address order.
202.2.89.0/24 202.2.91.0/24 202.4.244.0/23
IPv6 prefixes
All 3 prefixes.
2402:c800:fff1::/48 2402:c800:fff3::/48 2402:c800:fff6::/48
Other ASNs named NTT DOCOMO BUSINESS, Inc.
7 other networks use the same organisation name; together with AS37900 they announce 28,644,864 IPv4 addresses.
ASN Name IPv4 addresses
AS4713 OCN - NTT DOCOMO BUSINESS,Inc. JP 28,623,360 AS38639 HANABI - NTT DOCOMO BUSINESS, Inc. JP 13,312 AS18259 HIGE - NTT DOCOMO BUSINESS, Inc JP 4,096 AS7674 GOFORS - NTT DOCOMO BUSINESS, Inc JP 1,280 AS18072 STREAMWING - NTT DOCOMO BUSINESS, Inc. JP 1,280 AS18131 DXNW - NTT DOCOMO BUSINESS, Inc. JP 256 AS38629 OKN - NTT DOCOMO BUSINESS, Inc JP 256
Similar-sized networks in Japan
ASN Name IPv4 addresses
AS133458 #534 FSCJCL-AS-AP - FPT Smart Cloud Japan Co., Ltd1,024 AS153929 #535 ABI-AS-AP - Allied Business Inc.1,024 AS55569 #536 CRITEO-AS-AP - Criteo APAC1,024 AS55907 #538 GMO-DNS-R1 - GMO Internet, Inc.1,024 AS18149 #539 JPRS - Japan Registry Service Co., Ltd.1,024 AS37904 #540 BBIX-NETWORK - BBIX, Inc.1,024
IP-to-ASN data: iptoasn.com (public domain). Snapshot downloaded 2026-11-11, refreshed daily. Ranges are what each network announces in BGP, not registry allocations. Data sources