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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 |
| AS2520JP | AS2520-24 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS24285JP | AS24285-38 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS24297JP | FCN - University Public Corporation Osaka | — | — | 0 |
| AS131991JP | HELP-NET - JAPAN MAYDAY SERVICE CO., LTD. | — | — | 0 |
| AS151027JP | TAO_SAO_PAULO3 - AT&T TAO Cloud Access Node | — | — | 0 |
| AS23748JP | CAT-AS-AP - Cat Networks K.K. | — | — | 0 |
| AS7512JP | WITH - WITH Network | — | — | 0 |
| AS7518JP | AS7518-19 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS18083JP | AS18083-17 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS9992JP | AS9992-3 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS7685JP | AS7685-26 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS131936JP | UMGJP-NET - UNIVERSAL MUSIC LLC | — | — | 0 |
| AS4710JP | NTTV6NET2 - Nippon Telegraph and Telephone Corporation | — | — | 0 |
| AS151067JP | AS-VMW-HKG - VMWare Incorporation | — | — | 0 |
| AS24293JP | AS24293-46 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS63807JP | AS63807-38 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS135304JP | VMWARE-AS-AP - VMWare Incorporation | — | — | 0 |
| AS63796JP | AS63796-27 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS46953JP | INCLEAF - FENGYE INC | — | — | 0 |
| AS151070JP | AS-VMW-KIX - VMWare Incorporation | — | — | 0 |
| AS150143JP | IOTMEDIALAB-AS-AP - IotMedia Lab | — | — | 0 |
| AS55389JP | JPNE - Japan Internet Xing Co., Ltd. | — | — | 0 |
| AS18265JP | AS18265-7 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS17942JP | AS17942-13 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS37925JP | USEN-WEST - USEN CORPORATION | — | — | 0 |
| AS131084JP | MKInet-JP - MKI Network Solutions, Ltd. | — | — | 0 |
| AS17930JP | AS17930-1 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS7517JP | AS7517-18 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS7501JP | AS7501-2 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS17674JP | AS17674-2 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS23622JP | TSURU-GAKUEN - Tsuru Gakuen | — | — | 0 |
| AS17503JP | AS17503-1 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS151024JP | TAO_TOKYO - AT&T TAO Cloud Access Node | — | — | 0 |
| AS18288JP | AS18288-30 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS59113JP | RJV6-NET - RICOH JAPAN Corporation | — | — | 0 |
| AS55889JP | BITISLE-WEST - Equinix Japan Enterprise K.K. | — | — | 0 |
| AS17531JP | AS17531-29 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS131985JP | MAT-NET - Maple Audio Technology Corp | — | — | 0 |
| AS18082JP | LASDEC - Japan Agency for Local Authority Information Systems | — | — | 0 |
| AS23812JP | AS23812-40 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS58792JP | closip-1 - closip Inc. | — | — | 0 |
| AS7673JP | ALLES - ejworks corporation | — | — | 0 |
| AS18079JP | AS18079-13 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS4720JP | AS4720-38 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS37909JP | IKUEIKAN-NET - Ikueikan University | — | — | 0 |
| AS23835JP | AS23835-63 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |