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.
1,303 autonomous systems registered to Japan. Click an AS for detail.
| 668 |
| AS17506JP | UCOM - ARTERIA Networks Corporation | 5.5M | 41 |
| AS2497JP | IIJ - Internet Initiative Japan Inc. | 4.2M | 269 |
| AS2527JP | So-net - Sony Network Communications Inc. | 3.9M | 76 |
| AS2518JP | BIGLOBE - BIGLOBE Inc. | 3.7M | 35 |
| AS17511JP | OPTAGE - OPTAGE Inc. | 3M | 68 |
| 12.8K |
| — |
| 20 |
| AS23639JP | ntt-bizlink - NTT Bizlink, Inc. | 12.8K | 65.5K | 14 |
| AS18070JP | NDAC - Global Network Core Co.,Ltd. | 13.3K | 65.5K | 6 |
| AS23775JP | Tamatele-NET - Tamashima TV Inc. | 13.3K | 65.5K | 6 |
| AS63997JP | TSUKAERUNET - Tsukaeru.net, Web Hosting Company, Japan | 13.6K | 65.5K | 9 |
| AS38639JP | HANABI - NTT DOCOMO BUSINESS, Inc. | 13.6K | 65.5K | 7 |
| AS24295JP | AS-PNAPOSK - PacketFabric (Japan) Co., Ltd. | 13.6K | 65.5K | 9 |
| AS131931JP | ACTV-NET - Aomori Cable TV Co., Ltd. | 13.8K | — | 6 |
| AS9604JP | FSI-AS - FUJI SOFT INCORPORATED | 14.3K | — | 3 |
| AS23808JP | TOSHIMA-NET - TOSHIMA CABLE NETWORK CO.,LTD | 14.3K | — | 4 |
| AS24279JP | CAT-V - SENDAI CATV CO.,LTD. | 14.3K | 65.5K | 8 |
| AS55899JP | IROB - irob Ltd. | 14.8K | 131.1K | 8 |
| AS23822JP | HAGINET - HAGI Television Co., Ltd. | 15.1K | — | 30 |
| AS23620JP | DMM - DMM.com LLC | 15.4K | 1 | 7 |
| AS55384JP | JAIST-EXP - Japan Advanced Institute of Science and Technology | 16.4K | 1 | 2 |
| AS17694JP | JPN-DBJP - Deutsche Bank Group, Japan BGP connection | 16.4K | — | 3 |
| AS23635JP | CRCC - CRCCMedia Co.,ltd | 16.4K | — | 2 |
| AS23805JP | WATVnet - Watarase Television Co.,Ltd | 16.4K | 65.5K | 6 |
| AS9618JP | TCN - catv-tokushima | 16.4K | 65.5K | 3 |
| AS55910JP | SITNET-AS - Shibaura Institute of Technology | 16.4K | 1 | 2 |
| AS23619JP | E-OSAKA - SMARTVALUE Co.,Ltd. | 16.4K | — | 6 |
| AS23780JP | CTB - CTB Media Inc. | 16.4K | 65.5K | 6 |
| AS37922JP | CATVY - Diversitymedia Co.,Ltd. | 16.4K | 65.5K | 7 |
| AS152875JP | MEEQ - MEEQ Inc. | 16.9K | — | 5 |
| AS17683JP | WINTECH-COM - Wingtechnology Communications, Inc. | 17.4K | 65.5K | 5 |
| AS7503JP | AIR - Air Internet Service Co.,Ltd. | 17.4K | 65.5K | 5 |
| AS131952JP | POTATO-NET - Asahikawa Cable Television Co., Ltd. | 17.9K | — | 5 |
| AS23831JP | CLOVERNET - NISIOWARI CATV CORPORATION | 18.4K | 65.5K | 8 |
| AS23790JP | KCN-TV - JCOM Co., Ltd. | 18.4K | — | 2 |
| AS10011JP | ADVAN - advanscope inc. | 18.4K | 65.5K | 8 |
| AS24277JP | NIRAI - Okinawa Cable Network Inc. | 18.4K | 65.5K | 5 |
| AS23627JP | UCVNET - UEDA CABLE VISION CO.,LTD. | 18.4K | 65.5K | 8 |
| AS17936JP | CTK - Cable Television Kani Co.,Inc. | 18.4K | 65.5K | 6 |
| AS131911JP | HCTV-NET - HONJYO CABLE VISION CO., LTD. | 18.4K | 131.1K | 12 |
| AS151386JP | NCJ-NET - NHN Cloud Japan Corporation | 18.7K | — | 73 |
| AS17516JP | NTTCOMWARE - NTT COMWARE CORPORATION | 19.5K | 32.8K | 24 |
| AS17957JP | CTS - SOUTH TOKYO CABLETELEVISION | 19.5K | — | 6 |
| AS18097JP | DCN - D.C.N. Corporation | 20K | 65.5K | 20 |
| AS23784JP | POLEXCHENGE - SQUARE ENIX CO., LTD. | 20.2K | — | 10 |
| AS9999JP | ATTOKYO - AT TOKYO Corporation | 20.2K | 65.5K | 11 |
| AS10012JP | FUSION - Rakuten Mobile, Inc. | 20.5K | 65.5K | 5 |
| AS2512JP | TCP-NET - TCP Inc. | 20.5K | — | 15 |
| AS24278JP | USEN-NET - USEN CORPORATION | 20.5K | 65.5K | 3 |
| AS18281JP | TAC-NET - Tokoname New-TV Corporation | 20.5K | 256 | 6 |
| AS18267JP | DOSHISHA - Doshisha University | 20.5K | 1 | 3 |
| AS17931JP | NETFOREST - Netforest,Inc. | 20.5K | 65.5K | 10 |
| AS132827JP | GATEWAY-AS-AP - GATEWAY INC | 21.2K | — | 46 |