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 |
| 65.5K |
| 1 |
| 2 |
| AS55380JP | KAINS - Kanazawa University | 65.5K | — | 1 |
| AS17956JP | WASEDA - WASEDA University | 65.5K | — | 1 |
| AS18125JP | MAFFIN - Tsukuba Business-Academia Cooperation Support Center, Agriculture, Forestry and Fisheries Research Council Secretariat, Ministry of Agriculture, Forestry and Fisheries | 65.5K | — | 1 |
| AS10014JP | NIHON-U - Nihon University | 65.5K | 1 | 2 |
| AS24275JP | TOTO - TOTO LTD. | 65.5K | — | 1 |
| AS23623JP | CHUO-U - Chuo University | 65.5K | — | 1 |
| AS18128JP | RIKEN - RIKEN | 65.5K | — | 1 |
| AS63777JP | STARCLUSTER - National Institutes of Natural Sciences National Astronomical Observatory of JAPAN | 65.5K | — | 1 |
| AS24248JP | ASN-WADAI-U - Wakayama University | 65.5K | — | 1 |
| AS17523JP | AOYAMA - Aoyama Gakuin University | 65.5K | — | 2 |
| AS17510JP | ISID - INFORMATION SERVICES INTERNATIONAL - DENTSU, LTD. | 65.5K | — | 1 |
| AS23615JP | KUSANAGI - University of Shizuoka | 65.5K | — | 1 |
| AS131930JP | TBS-NET - Tokyo Broadcasting System Television, Inc. | 65.5K | — | 1 |
| AS45685JP | RIKKYO-U - Rikkyo Gakuin Rikkyo University | 65.5K | — | 1 |
| AS2500JP | WIDE-BB - WIDE Project | 65.5K | 65.5K | 4 |
| AS9991JP | SHUDO-U - Hiroshima Shudo University | 65.5K | 1 | 2 |
| AS2508JP | kyushu-u - Kyushu University | 65.5K | — | 1 |
| AS37910JP | CUNET - Chubu University | 65.5K | — | 1 |
| AS18148JP | FUKUOKA-U - Fukuoka University | 65K | 65.5K | 9 |
| AS131918JP | SCN-NET - SHONAN CABLE NETWORK | 61.4K | 65.5K | 13 |
| AS18134JP | KITANET - JCOM Co., Ltd. | 59.4K | — | 24 |
| AS59125JP | CYBERHOME1 - FAMILY NET JAPAN INCORPORATED | 58.9K | 393.2K | 19 |
| AS55900JP | GLBB-JP - GLBB Japan KK | 57.3K | 65.5K | 32 |
| AS23783JP | CNA - Cable Networks Akita Co.,ltd. | 55K | 65.5K | 21 |
| AS18068JP | ACROSS - Dream Wave Shizuoka Co. Ltd. | 54K | 65.8K | 53 |
| AS17675JP | AS-PNAPTOK - PacketFabric (Japan) Co., Ltd. | 52.5K | 65.5K | 18 |
| AS37892JP | WAI-NET - Cable Media WAIWAI Co.,Ltd. | 52.2K | 65.5K | 7 |
| AS24271JP | iCTV - Iruma CATV co. | 51.2K | 65.5K | 9 |
| AS23791JP | LCV - LCV Corporation | 51.2K | 65.5K | 7 |
| AS4680JP | MIND - Mitsubishi Electric Information Network Corporation | 51.2K | 65.5K | 27 |
| AS55387JP | RMGR-MIX - Japan Communication Inc. | 49.2K | — | 2 |
| AS131934JP | ICC-NET - ICC Corporation | 49.2K | 65.5K | 14 |
| AS23788JP | HICT - JCOM Co., Ltd. | 49.2K | — | 21 |
| AS4677JP | PTOP - Marubeni OKI Network Solutions Inc. | 48.9K | — | 9 |
| AS10019JP | MCTV - Matsusaka Cable-TV Station Inc. | 47.1K | 65.5K | 12 |
| AS18278JP | CC9N - Cable TV Corporation | 47.1K | 65.5K | 10 |
| AS18282JP | CORALNET - Tonami System Solutions Co., Ltd. | 47.1K | 65.5K | 12 |
| AS10003JP | OCT-NET - Ogaki Cable Television Co.,Inc. | 45.1K | 65.5K | 14 |
| AS4693JP | CSK - CSK-IT MANAGEMENT CORPORATION | 45.1K | 65.5K | 8 |
| AS23785JP | SUNFIELD - SUN FIELD INTERNET LIMITED | 45.1K | — | 3 |
| AS17955JP | AVISNET - Densan Co., Ltd. | 43.5K | 65.5K | 12 |
| AS2511JP | CORE - Nippon Telegraph and Telephone Corporation | 41.7K | — | 5 |
| AS24276JP | ICNET - JCOM Co., Ltd. | 41K | — | 6 |
| AS7676JP | TAM - TAM Co., Ltd. | 39.7K | 196.6K | 26 |
| AS18135JP | BTV - BTV CO.,LTD. | 38.9K | 65.5K | 11 |
| AS59109JP | HITCLOUD - Hitachi,Ltd., Managed & Platform Services Business Division | 38.9K | — | 111 |