Loading…
How Japan ranks worldwide on dormant space, the transfer market, routing security and address density.
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 |
| 512 |
| — |
| 2 |
| AS151390JP | RUTILEA-A - RUTILEA, Inc. | 512 | — | 1 |
| AS152876JP | COMOTA - Comota Co., Ltd. | 512 | 65.5K | 2 |
| AS151383JP | EZSVS-NET - EZSVS Japan Co., Ltd. | 512 | — | 1 |
| AS63791JP | DOORNOC-NET - doornoc | 512 | 65.5K | 2 |
| AS63785JP | FU-NTP - Fukuoka University | 512 | 3 | 5 |
| AS147035JP | CHINGKUO-AS-AP - Ching Kuo | 512 | 1 | 2 |
| AS59098JP | Hinaturu-Net - Mamireimu Net Work's | 512 | 4.1K | 3 |
| AS132504JP | QUALITIA-AS-AP - QUALITIA Co.,Ltd | 512 | — | 1 |
| AS63805JP | RIDC-NET - Ryobi Systems Co., Ltd. | 512 | 3 | 4 |
| AS59120JP | TINS-NET - Tsukuba Internet Service Corporation | 512 | — | 1 |
| AS137819JP | BEEKS-AS-AP - Beeks Financial Cloud (Japan) | 512 | — | 2 |
| AS63804JP | DOVA-YFM-NET - DOVA Corporation | 512 | — | 1 |
| AS131988JP | TANET - Takehara Cable Network Co,Ltd | 512 | 65.5K | 2 |
| AS7257JP | MARU-NET OTO GK | 512 | 524.3K | 3 |
| AS151350JP | NIPPONCOMMSINC-AS-AP - NIPPON COMMUNICATIONS INC. | 512 | 65.5K | 2 |
| AS151385JP | JAPANET-H - Japanet Holdings Co.,Ltd. | 512 | — | 1 |
| AS152877JP | NIN - Nintendo Co., Ltd | 512 | 2 | 4 |
| AS63797JP | CUTEIP - CuteIP | 512 | 65.5K | 4 |
| AS150356JP | GMO-BRS - GMO BRAND SECURITY Inc. | 512 | — | 1 |
| AS38636JP | DENA-NET - DeNA, Co. Ltd. | 512 | 3 | 5 |
| AS38656JP | Loutres - Loutres | 512 | 1 | 3 |
| AS63806JP | MENHERA - Human-life Information Platforms Institute | 512 | 514 | 6 |
| AS142052JP | MEMPOOLSPACEKK-AS-AP - Mempool Space K.K. | 512 | 2 | 4 |
| AS146974JP | WP-NET - Woven by Toyota, Inc. | 512 | 65.5K | 2 |
| AS131948JP | FORNEXT - FORNEXT Inc. | 256 | 1 | 2 |
| AS131924JP | KAP-NET - Kansai Airports | 256 | 1 | 2 |
| AS23774JP | A-DNS-JP - Japan Registry Service Co., Ltd. | 256 | 65.5K | 2 |
| AS55890JP | SUNTORY - Suntory Business Systems Ltd. | 256 | — | 1 |
| AS135372JP | CSJI-AS-AP - Columbia Sportswear Japan Inc | 256 | — | 1 |
| AS131894JP | U-Cloud-2 - UNIADEX, LTD. | 256 | — | 1 |
| AS62184JP | MNO-AS Michal Nowak | 256 | 1 | 2 |
| AS133180JP | STARBOWLTD-AS-AP - Starbow Ltd. | 256 | — | 1 |
| AS152184JP | TAMUKAINET-AS-AP - Tamukai Network | 256 | 265 | 11 |
| AS152869JP | ICJ-NET - ICJ, Inc. | 256 | — | 1 |
| AS146980JP | IOC - Tokyo Metropolitan College of Industrial Technology Infomation System Engineering Course | 256 | 1 | 2 |
| AS134827JP | EYJAPAN-AS-AP - EY Japan Co., Ltd. | 256 | — | 1 |
| AS150368JP | TESTBED-KLN - SERVER-G Group | 256 | 2 | 3 |
| AS45678JP | AAC-JP-AS - ABN AMRO Clearing Tokyo Co., Ltd. | 256 | — | 1 |
| AS146986JP | SSC-3 - SUZUYO SHINWART CORPORATION | 256 | 256 | 2 |
| AS131951JP | SSC - Suzuyo Shinwart Corporation | 256 | 256 | 2 |
| AS131903JP | NRI-IVPN - Nomura Research Institute,Ltd. | 256 | — | 1 |
| AS214675JP | Starlamp Hidenori Matsuo | 256 | 4.7K | 18 |
| AS152870JP | KAICHI-NET - Incorporated Educational Institution Kaichigakuen | 256 | 1 | 2 |
| AS63780JP | BIRDIE-NET - dual&Co. Inc. | 256 | 16.4K | 2 |
| AS131156JP | LAC-AS - LAC Co., Ltd. | 256 | 1 | 2 |
| AS23634JP | E-DNS-JP - WIDE Project | 256 | 8.2K | 2 |