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 | 206 |
| AS2527JP | So-net - Sony Network Communications Inc. | 3.9M | 76 |
| AS2518JP | BIGLOBE - BIGLOBE Inc. | 3.7M | 35 |
| AS17511JP | OPTAGE - OPTAGE Inc. | 3M | 68 |
| DATAHOTEL-JP - AS for DATAHOTEL, which is one of iDC in Japan, |
| 118.5K |
| 65.5K |
| 27 |
| AS24572JP | YAHOO-JP-AS-AP - Yahoo Japan | 118.8K | 65.5K | 5 |
| AS7516JP | TOHKNET - TOHKnet Co.,Inc. | 119K | 8.2K | 10 |
| AS58791JP | GMO-I-R2 - GMO Internet, Inc. | 120.1K | 8.2K | 180 |
| AS131159JP | AS-YAMAGATAU - Yamagata University | 123.4K | 1 | 7 |
| AS7502JP | IP-KYOTO - Advanced Software Technology & Management Research Institute of KYOTO | 123.4K | — | 7 |
| AS58647JP | KAGAWAU-AS - Kagawa University | 128.9K | — | 183 |
| AS58652JP | Kochi-U-NET - Kochi University | 131.1K | — | 5 |
| AS38635JP | KEIO-NET - Keio University | 131.1K | 2 | 4 |
| AS55390JP | TUSNET - Tokyo University of Science | 131.1K | 1 | 4 |
| AS55379JP | hosei-net - Hosei University | 131.1K | 1 | 4 |
| AS55904JP | KOGAKUIN-AS - KOGAKUIN University | 131.1K | 1 | 4 |
| AS9355JP | NICT - National Institute of Information and Communications Technology | 131.1K | 1 | 3 |
| AS131919JP | MEIJI-NET - Meiji University | 131.1K | — | 3 |
| AS131981JP | TAKUSHOKUNET - Takushoku University | 131.1K | — | 6 |
| AS17512JP | JAL - Japan Airlines Co.,Ltd. | 131.1K | — | 3 |
| AS17701JP | SEINAN - Seinan Gakuin University | 131.1K | 1 | 4 |
| AS59104JP | SOKAU-AS - Soka University | 131.1K | — | 3 |
| AS4729JP | JAEA - Japan Atomic Energy Agency | 131.1K | — | 2 |
| AS38641JP | LEONET-AS - Osaka Sangyo University | 131.1K | — | 3 |
| AS7509JP | HINES - Hokkaido University | 131.3K | — | 3 |
| AS17687JP | NICE - National University Corporation Nagoya University | 131.3K | — | 3 |
| AS17944JP | JWA - Japan Weather Association | 131.8K | 1 | 6 |
| AS2504JP | NCA5 - Kyoto University | 132.1K | — | 4 |
| AS37917JP | UTINS - University of Tsukuba | 132.1K | — | 3 |
| AS7670JP | CTNET - Enecom,Inc. | 134.7K | 65.5K | 20 |
| AS63802JP | MIKAKA-EAST - Nippon Telegraph and Telephone East Corporation | 134.9K | — | 17 |
| AS18087JP | TOYO - Toyo University | 135.2K | 1 | 5 |
| AS17529JP | MediaCat - STARCAT Co .,LTD. | 135.4K | 65.5K | 14 |
| AS37918JP | ECL-INET - NTT, Inc. | 136.5K | 1 | 23 |
| AS18271JP | EVOnet - Sojitz Tech Innovation Co., Ltd. | 139.3K | — | 6 |
| AS38631JP | LINE - LY Corporation | 142.6K | 65.7K | 263 |
| AS23820JP | RAKUTEN - Rakuten Group, Inc. | 143.6K | 70.7K | 17 |
| AS10006JP | SECOMTRUST - SECOM Trust Systems Co.,Ltd. | 146.2K | 2 | 57 |
| AS9622JP | KCT - Kurashiki Cable TV | 157.7K | 65.5K | 51 |
| AS9997JP | MECHA - Suzuka Cable Co.,Ltd | 157.7K | 65.5K | 11 |
| AS9374JP | EDION - EDION Corporation | 165.9K | 65.5K | 23 |
| AS9614JP | OCT - JCOM Marketing Co.,Ltd. | 165.9K | — | 25 |
| AS17698JP | CCNET-NET - COMMUNITY NETWORK CENTER INCORPORATED. | 174.1K | — | 37 |
| AS131921JP | GMOCL - GMO GlobalSign Holdings K.K. | 178.7K | 2K | 66 |
| AS59108JP | KATCH-NET - KATCH NETWORK INC. | 192.5K | 256 | 46 |
| AS7514JP | MEX - Computer Engineering & Consulting, Ltd. | 196.1K | 65.5K | 23 |
| AS18268JP | JANIS - Naganoken Kyodou Densan Co.Ltd. | 198.1K | 65.5K | 10 |
| AS23793JP | AIST - National Institute of Advanced Industrial Science and Technology | 199.9K | — | 18 |
| AS9354JP | TDNC - Community Network Center Inc. | 200.4K | 65.5K | 38 |
| AS4686JP | BEKKOAME - BEKKOAME INTERNET INC. | 200.4K | 65.5K | 66 |
| AS2501JP | UTnet - The University of Tokyo | 200.7K | 65.5K | 6 |