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 |
| 43.5K |
| 65.5K |
| 12 |
| AS23785JP | SUNFIELD - SUN FIELD INTERNET LIMITED | 45.1K | — | 3 |
| AS4693JP | CSK - CSK-IT MANAGEMENT CORPORATION | 45.1K | 65.5K | 8 |
| AS10003JP | OCT-NET - Ogaki Cable Television Co.,Inc. | 45.1K | 65.5K | 14 |
| AS55900JP | GLBB-JP - GLBB Japan KK | 46.1K | 65.5K | 28 |
| AS18278JP | CC9N - Cable TV Corporation | 47.1K | 65.5K | 10 |
| AS18282JP | CORALNET - Tonami System Solutions Co., Ltd. | 47.1K | 65.5K | 12 |
| AS10019JP | MCTV - Matsusaka Cable-TV Station Inc. | 47.1K | 65.5K | 12 |
| AS4677JP | PTOP - Marubeni OKI Network Solutions Inc. | 48.9K | — | 9 |
| AS55387JP | RMGR-MIX - Japan Communication Inc. | 49.2K | — | 2 |
| AS23788JP | HICT - JCOM Co., Ltd. | 49.2K | — | 21 |
| AS23791JP | LCV - LCV Corporation | 51.2K | 65.5K | 7 |
| AS4680JP | MIND - Mitsubishi Electric Information Network Corporation | 51.2K | 65.5K | 27 |
| AS24271JP | iCTV - Iruma CATV co. | 51.2K | 65.5K | 9 |
| AS17675JP | AS-PNAPTOK - PacketFabric (Japan) Co., Ltd. | 51.5K | 65.5K | 15 |
| AS37892JP | WAI-NET - Cable Media WAIWAI Co.,Ltd. | 52.2K | 65.5K | 7 |
| AS18068JP | ACROSS - Dream Wave Shizuoka Co. Ltd. | 54K | 65.8K | 53 |
| AS23783JP | CNA - Cable Networks Akita Co.,ltd. | 55K | 65.5K | 21 |
| AS59125JP | CYBERHOME1 - FAMILY NET JAPAN INCORPORATED | 58.9K | 393.2K | 19 |
| AS18134JP | KITANET - JCOM Co., Ltd. | 59.4K | — | 24 |
| AS9621JP | II-OKINAWA - Okinawa Telecommunication Network Co.,Inc | 60.4K | 65.5K | 13 |
| AS131918JP | SCN-NET - SHONAN CABLE NETWORK | 61.4K | 65.5K | 13 |
| AS18148JP | FUKUOKA-U - Fukuoka University | 65K | 65.5K | 9 |
| AS55380JP | KAINS - Kanazawa University | 65.5K | — | 1 |
| AS58785JP | TGU-NET - Tohoku Gakuin University | 65.5K | 1 | 2 |
| AS18125JP | MAFFIN - Tsukuba Business-Academia Cooperation Support Center, Agriculture, Forestry and Fisheries Research Council Secretariat, Ministry of Agriculture, Forestry and Fisheries | 65.5K | — | 1 |
| AS2500JP | WIDE-BB - WIDE Project | 65.5K | 65.5K | 4 |
| AS18128JP | RIKEN - RIKEN | 65.5K | — | 1 |
| AS18276JP | KAISER - Kansai University | 65.5K | — | 1 |
| AS17946JP | GUCC - Gifu University | 65.5K | — | 1 |
| AS9593JP | NIKKEI - Nikkei Inc. | 65.5K | — | 1 |
| AS131897JP | EHIME-U - National University Corporation ,Ehime University | 65.5K | — | 1 |
| AS17510JP | ISID - INFORMATION SERVICES INTERNATIONAL - DENTSU, LTD. | 65.5K | — | 1 |
| AS2513JP | JST - Japan Science and Technology Agency | 65.5K | — | 1 |
| AS17523JP | AOYAMA - Aoyama Gakuin University | 65.5K | — | 2 |
| AS23615JP | KUSANAGI - University of Shizuoka | 65.5K | — | 1 |
| AS9991JP | SHUDO-U - Hiroshima Shudo University | 65.5K | 1 | 2 |
| AS24248JP | ASN-WADAI-U - Wakayama University | 65.5K | — | 1 |
| AS23807JP | RITSUMEI - Ritsumeikan University | 65.5K | — | 1 |
| AS2508JP | kyushu-u - Kyushu University | 65.5K | — | 1 |
| AS37910JP | CUNET - Chubu University | 65.5K | — | 1 |
| AS131930JP | TBS-NET - Tokyo Broadcasting System Television, Inc. | 65.5K | — | 1 |
| AS17956JP | WASEDA - WASEDA University | 65.5K | — | 1 |
| AS24254JP | KYOTO-SU - Kyoto Sangyo University | 65.5K | — | 1 |
| AS24268JP | SAINS - National University Corporation Shizuoka University | 65.5K | — | 1 |
| AS63777JP | STARCLUSTER - National Institutes of Natural Sciences National Astronomical Observatory of JAPAN | 65.5K | — | 1 |
| AS131938JP | NISSAN-NET - NISSAN MOTOR CO.,LTD. | 65.5K | — | 1 |