Loading…
How Japan ranks worldwide on dormant space, the transfer market, routing security and address density.
PeeringDB-registered presence.
APNIC-measured end-user deployment.
Clean prefixes (valid RPKI + IRR, no mismatch).
Cumulative IPv4, IPv6, and ASN allocations to Japan over time.
The largest autonomous systems registered to Japan by IPv4 footprint.
Share of announced address space covered by valid Route Origin Authorizations.
1,297 autonomous systems registered to Japan. Click an AS for detail.
| 669 |
| AS17506JP | UCOM - ARTERIA Networks Corporation | 5.5M | 41 |
| AS2497JP | IIJ - Internet Initiative Japan Inc. | 4M | 205 |
| AS2527JP | So-net - Sony Network Communications Inc. | 3.9M | 76 |
| AS2518JP | BIGLOBE - BIGLOBE Inc. | 3.7M | 36 |
| AS17511JP | OPTAGE - OPTAGE Inc. | 3M | 67 |
| 8.2K |
| — |
| 2 |
| AS23804JP | AIN-NET - Nonprofit Organization Kitaura Hana Net | 8.2K | — | 1 |
| AS59096JP | MAIN - Meiji Gakuin University | 8.2K | — | 2 |
| AS59102JP | GENES - GENES Co., Ltd. | 8.2K | — | 7 |
| AS7686JP | ATNETHOME - JCOM Co., Ltd. | 8.2K | — | 2 |
| AS59091JP | KAIT-NWLAB - Kanagawa Institute of Technology | 8.2K | — | 1 |
| AS45675JP | KMN-TOKYO - JCOM Co., Ltd. | 8.2K | — | 3 |
| AS55912JP | u-kochi - University of Kochi | 8.4K | 65.5K | 6 |
| AS23817JP | KOCHI-IDC - Fujitsu Limited. | 8.4K | — | 3 |
| AS45691JP | DODO-CORE - DODO K.K. | 8.4K | 202K | 42 |
| AS45687JP | MCT-Internet - Minamikyusyu CableTV Net Inc. | 8.7K | 65.5K | 7 |
| AS151387JP | OCTP-NET - OMURA CABLE TELEVISION K.K. | 8.7K | — | 3 |
| AS17940JP | CYBERLINKS - CYBER LINKS Co.,Ltd. | 8.7K | — | 4 |
| AS37908JP | KBC - KIBI Cable Television Co.,Ltd. | 8.7K | 65.5K | 7 |
| AS173JP | NTTECL-AS - Nippon Telegraph and Telephone Corporation | 8.7K | — | 2 |
| AS131970JP | Hikarinet - Hikarinet Inc. | 8.7K | 65.5K | 3 |
| AS18259JP | HIGE - NTT DOCOMO BUSINESS, Inc | 9K | 65.8K | 8 |
| AS45677JP | ICV - Isahaya Cable Media Co.,Ltd | 9.2K | 65.5K | 5 |
| AS7664JP | HARENET - HARENET INC. | 9.2K | 65.5K | 3 |
| AS63770JP | ICSCOE-AS - Industrial Cyber Security Center of Excellence | 9.2K | 69.6K | 13 |
| AS63798JP | IPA-ENTERNET - Industrial Cyber Security Center of Excellence | 9.2K | 768 | 4 |
| AS142622JP | DIL-AS-AP - Dream Information Laboratory | 9.2K | 524.3K | 37 |
| AS17689JP | H-IX - Hokuden Information Technology,Inc. | 9.7K | 65.5K | 6 |
| AS151375JP | HIMAWARI-NET - HimawariTV.Corporation | 9.7K | — | 3 |
| AS63784JP | GSS-NET - Digital Agency | 10K | 1M | 11 |
| AS23967JP | PoD - Produce On Demand Inc. Streaming Contents Delivery Service Tokyo | 10K | — | 7 |
| AS59126JP | NCT - NCT CO.,LTD. | 10.2K | 65.5K | 6 |
| AS23618JP | ICV-NET - Ibara Broadcasting Company | 10.2K | 65.5K | 6 |
| AS24289JP | KBN - Kagawa T.V Broadcast Network Co,.Ltd | 10.2K | 1 | 5 |
| AS131926JP | CTS-NET - Cable Television Saiki Co. , Ltd. | 10.2K | — | 4 |
| AS131933JP | TTV-NET - TAMA Television Co., Ltd | 10.2K | 65.5K | 6 |
| AS138968JP | RAINBOWIDC-AS-AP - rainbow network limited | 10.2K | 589.8K | 24 |
| AS18526JP | DDPS - DDPS Networks, LLC | 10.2K | 161 | 34 |
| AS7529JP | NETIRD - GMO NetIRD, Inc. | 10.8K | 65.5K | 10 |
| AS4785JP | XTOM-AS-JP - xTom | 10.8K | 938K | 62 |
| AS24336JP | DIGITALBANK-JP - DIGITALBANK, Inc., Regional ISP in Japan | 11.3K | — | 13 |
| AS17661JP | NHN-JAPAN - NHN Cloud Japan Corporation | 11.5K | — | 25 |
| AS55385JP | DA - Digital Alliance Co.,Ltd. | 12.3K | 65.5K | 9 |
| AS55388JP | ASJ - ASJ INC. | 12.3K | 65.5K | 3 |
| AS23628JP | ACCSnet - Academic newtown Community Cable Service | 12.3K | 65.5K | 3 |
| AS17953JP | ICO - BroadBand Security, Inc. | 12.3K | 196.6K | 14 |
| AS18142JP | BIWALOBE - KISTEM Co., Ltd. | 12.3K | — | 2 |
| AS23630JP | CAC-NET - CAC Inc. | 12.3K | — | 5 |
| AS18266JP | ATNAP - Cable Networks Akita Co.,ltd. | 12.3K | 65.5K | 4 |
| AS23639JP | ntt-bizlink - NTT Bizlink, Inc. | 12.8K | 65.5K | 14 |
| AS17505JP | SBmobile - SoftBank Corp. | 12.8K | — | 20 |
| AS18070JP | NDAC - Global Network Core Co.,Ltd. | 13.3K | 65.5K | 6 |