AS38629 NTT DOCOMO BUSINESS, Inc

OKN - NTT DOCOMO BUSINESS, Inc · registered in Japan

IPv4 addresses2561 prefixes · <0.001% of announced IPv4

Rank in Japan#658largest network in JP by IPv4 space, of 724 · <0.01% of JP

Rank worldwide#61,231of 79,396 networks with IPv4

IPv61 x /481 prefixes

CountryJapan745 ASNs registered there

Open AS38629 in ASN lookup Look up an IP in this network (202.245.31.1) All networks in Japan

IPv4 prefixes

All 1 prefix, in address order.

202.245.31.0/24

IPv6 prefixes

All 1 prefix.

2001:df0:43::/48

Other ASNs named NTT DOCOMO BUSINESS, Inc

7 other networks use the same organisation name; together with AS38629 they announce 28,644,864 IPv4 addresses.

ASNNameIPv4 addresses

AS4713OCN - NTT DOCOMO BUSINESS,Inc. JP28,623,360

AS38639HANABI - NTT DOCOMO BUSINESS, Inc. JP13,312

AS18259HIGE - NTT DOCOMO BUSINESS, Inc JP4,096

AS7674GOFORS - NTT DOCOMO BUSINESS, Inc JP1,280

AS18072STREAMWING - NTT DOCOMO BUSINESS, Inc. JP1,280

AS37900MATSURI - NTT DOCOMO BUSINESS, Inc. JP1,024

AS18131DXNW - NTT DOCOMO BUSINESS, Inc. JP256

Similar-sized networks in Japan

ASNNameIPv4 addresses

AS18131#655 DXNW - NTT DOCOMO BUSINESS, Inc.256

AS23642#656 OBIS - OBIS256

AS24287#657 TEIN2-JP - National Institute of Informatics256

AS38644#659 KANDANET - INTERNET MULTIFEED CO.256

AS45674#660 MIDORI - BIGLOBE Inc.256

AS55895#661 echigo-IX - N.S.Computer Service Co.,Ltd.256

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