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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 |
| TAO_MIAMI1 - AT&T TAO Cloud Access Node |
| — |
| — |
| 0 |
| AS18122JP | KYOTO-IX - Advanced Software Technology & Management Research Institute of KYOTO | — | — | 0 |
| AS151067JP | AS-VMW-HKG - VMWare Incorporation | — | — | 0 |
| AS2498JP | AS2498-2 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS215239JP | SHOW Show Corporation | — | 512 | 2 |
| AS23809JP | TV-NARUTO - Televi Naruto .CO.,LTD | — | — | 0 |
| AS17677JP | MIINET - ARTERIA Networks Corporation | — | — | 0 |
| AS9360JP | AS9360-12 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS146970JP | BBS - BBSakura Networks, Inc. | — | — | 0 |
| AS23802JP | AS23802-30 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS9596JP | AS9596-6 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS134473JP | TAO_CHICAGO - AT&T TAO Cloud Access Node | — | — | 0 |
| AS131973JP | JST-Fukuoka - J-Stream Inc. | — | — | 0 |
| AS131898JP | YAHOO-3 - LY Corporation | — | — | 0 |
| AS45674JP | MIDORI - BIGLOBE Inc. | — | — | 0 |
| AS24047JP | ISC-KIX1 - Internet Systems Consortium, Inc. | — | — | 0 |
| AS9909JP | TELSTRAGLOBAL - Telstra Global Internet Services Network Blocks | — | — | 0 |
| AS151381JP | AS151381-11 - JPNIC-4Byte-ASBLOCK-AP | — | — | 0 |
| AS151022JP | TAO_SYDNEY3 - AT&T TAO Cloud Access Node | — | — | 0 |
| AS10005JP | AS10005-16 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS146971JP | M-ADVENTURE - Media Adventure Inc | — | — | 0 |
| AS7666JP | OKIX-1 - Mitsubishi Corporation | — | — | 0 |
| AS4733JP | AS4733-51 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS9361JP | AS9361-13 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS150810JP | TAO_MONTREAL - AT&T TAO Cloud Access Node | — | — | 0 |
| AS131152JP | BBIX-L3RPX - BBIX,Inc. | — | — | 0 |
| AS59114JP | RECRUIT - Recruit Co., Ltd. | — | — | 0 |
| AS17532JP | T-KOUGEI - Tokyo Polytechnic University | — | — | 0 |
| AS131073JP | TELSTRAGLOBAL - Telstra Global Internet Services Network Blocks | — | — | 0 |
| AS23779JP | N-BONE - NTT DOCOMO BUSINESS, Inc. | — | — | 0 |
| AS10033JP | IVANET-TYO-AP - iBasis Tokyo ICO | — | — | 0 |
| AS9995JP | AS9995-6 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS152862JP | SOLTIEND - Shiojiri City | — | — | 0 |
| AS131985JP | MAT-NET - Maple Audio Technology Corp | — | — | 0 |
| AS58792JP | closip-1 - closip Inc. | — | — | 0 |
| AS38653JP | JAPANPOST - JAPAN POST HOLDINGS Co., Ltd. | — | — | 0 |
| AS38080JP | FSW-Tohoku-POP - Foresightwave INC. | — | — | 0 |
| AS24266JP | AS24266-19 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS24273JP | CANON - CANON INC. | — | — | 0 |
| AS4692JP | INTERGATE - InternetWare Co., LTD. | — | — | 0 |
| AS56033JP | RAKUIP-AS-AP - Rakushasu Inc | — | — | 0 |
| AS37894JP | AS37894-7 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS23829JP | AS23829-57 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS18273JP | AS18273-15 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS4732JP | DION - KDDI CORPORATION | — | — | 0 |
| AS4688JP | HI-HO - Internet Initiative Japan Inc. | — | — | 0 |
| AS4676JP | AS4676-5 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |