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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 |
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| 0 |
| AS7517JP | AS7517-18 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS131975JP | OedoTelecom - Oedo Telecom Inc | — | — | 0 |
| AS132496JP | SBIBITS-AS-AP - SBI BITS Co., Ltd. | — | — | 0 |
| AS401655JP | TRANSVISIONNET - TransVision LLC | — | — | 0 |
| AS7603JP | GENECOMPUTINGLTD-AS-AP - Gene Computing Ltd | — | — | 0 |
| AS150362JP | Kuriyama-Net - Mamireimu Net Work's | — | — | 0 |
| AS131978JP | NTTCOM-VoIP - NTT DOCOMO BUSINESS,Inc. | — | — | 0 |
| AS18089JP | HIKARI-NWC - KDDI Corporation | — | — | 0 |
| AS4707JP | AS4707-25 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS138181JP | HEXHU - Hu's Tech LLC | — | 2 | 1 |
| AS24121JP | ASN-EQIX-OSAKA-AP - Equinix Asia Pacific | — | 512 | 2 |
| AS201345JP | Shuma-Watanabe Shuma Watanabe | — | 261 | 3 |
| AS199436JP | A-NET BangLong Yang | — | 288 | 14 |
| AS17684JP | AS17684-12 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS9375JP | AS9375-27 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS9904JP | TELSTRAGLOBAL - Telstra Global Internet Services Network Blocks | — | — | 0 |
| AS55372JP | OIX - University of the Ryukyus | — | — | 0 |
| AS17681JP | AS17681-9 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS17949JP | TEU - Tokyo University of Technorogy | — | — | 0 |
| AS214699JP | ROSETTA-MNT LIU JIARONG | — | — | 0 |
| AS23787JP | AS23787-15 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS140642JP | WASABI-AS-AP - Wasabi Technologies Inc. | — | — | 0 |
| AS4700JP | NIJI-NET - Niji-Net Inc. | — | — | 0 |
| AS151024JP | TAO_TOKYO - AT&T TAO Cloud Access Node | — | — | 0 |
| AS150143JP | IOTMEDIALAB-AS-AP - IotMedia Lab | — | — | 0 |
| AS150360JP | NTTE-WFL-AS - NIPPON TELEGRAPH AND TELEPHONE EAST CORPORATION | — | — | 0 |
| AS131990JP | AS131990-86 - JPNIC-4Byte-ASBLOCK-AP | — | — | 0 |
| AS55873JP | SJMAPNIC-JP - St. Jude Medical | — | — | 0 |
| AS37895JP | RYUKOKU - Ryukoku University | — | — | 0 |
| AS17527JP | MEDIAS - CHITA MEDIAS NETWORK INC. | — | — | 0 |
| AS9594JP | AS9594-4 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS7619JP | IIJLAB-BACKUP-LINKS-EXP - Internet Initiative Japan, Inc. | — | — | 0 |
| AS2517JP | AS2517-21 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS151074JP | AS-VMW-TPE - VMWare Incorporation | — | — | 0 |
| AS18280JP | AS18280-22 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS138352JP | Fractal-NET - Fractal Co., Ltd. | — | — | 0 |
| AS23625JP | TOKAI-WBS - TOKAI Communications Corporation | — | — | 0 |
| AS18147JP | AS18147-27 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS7669JP | AS7669-10 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS17517JP | AS17517-15 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS7681JP | AS7681-22 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS215239JP | SHOW Show Corporation | — | 512 | 2 |
| AS215871JP | XTOM-JP xTom Japan Corporation | — | 524.3K | 1 |
| AS150314JP | RIVULETNETWORKS-AS-AP - Rivulet Networks | — | 1 | 1 |
| AS56218JP | QGPOP-AS-AP - QGPOP | — | 65.5K | 1 |
| AS23801JP | AS23801-29 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |