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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 |
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| 0 |
| AS4698JP | INTERLINK - InterLink Co., Ltd. | — | — | 0 |
| AS150298JP | MORE-WAIFU-BACKBONE - More Waifu Backbone | — | — | 0 |
| AS151069JP | AS-VMW-MEL - VMWare Incorporation | — | — | 0 |
| AS131157JP | MAGMA-IPV6 - IMS Corporation | — | — | 0 |
| AS17945JP | iTV - iTV Co,Ltd | — | — | 0 |
| AS10020JP | AS10020-31 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS9369JP | AS9369-21 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS24121JP | ASN-EQIX-OSAKA-AP - Equinix Asia Pacific | — | 512 | 2 |
| AS214772JP | NAZUKI-AS CHEN LUOAN | — | 16 | 1 |
| AS56218JP | QGPOP-AS-AP - QGPOP | — | 65.5K | 1 |
| AS9743JP | NIPPONEDUIX-AS-AP - Nippon EDUIX | — | 1 | 1 |
| AS131152JP | BBIX-L3RPX - BBIX,Inc. | — | — | 0 |
| AS131980JP | KINIKUNET - KADOKAWA CORPORATION | — | — | 0 |
| AS132726JP | SANYUNETCORP-JP - 5-3 Miyuki-cho | — | — | 0 |
| AS9377JP | AS9377-29 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS17688JP | AS17688-16 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS18073JP | AS18073-7 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS131073JP | TELSTRAGLOBAL - Telstra Global Internet Services Network Blocks | — | — | 0 |
| AS17532JP | T-KOUGEI - Tokyo Polytechnic University | — | — | 0 |
| AS59114JP | RECRUIT - Recruit Co., Ltd. | — | — | 0 |
| AS63803JP | AS63803-34 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS150810JP | TAO_MONTREAL - AT&T TAO Cloud Access Node | — | — | 0 |
| AS9361JP | AS9361-13 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS4733JP | AS4733-51 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS7666JP | OKIX-1 - Mitsubishi Corporation | — | — | 0 |
| AS9596JP | AS9596-6 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS10005JP | AS10005-16 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS199767JP | DOVE-AS Pinjia Zhao | — | 256 | 1 |
| AS215871JP | XTOM-JP xTom Japan Corporation | — | 524.3K | 1 |
| AS7520JP | AS7520-21 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS131979JP | ZIPNET - ZIP Telecom | — | — | 0 |
| AS10124JP | AMAZON-AP-RESOURCES-AS-AP-NRT - Amazon Data Services Japan KK | — | — | 0 |
| AS18288JP | AS18288-30 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS18286JP | AS18286-28 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS23663JP | YAHOO-BANGALORE-AS-AP - Yahoo Bangalore Network Monitoring Center | — | — | 0 |
| AS55389JP | JPNE - Japan Internet Xing Co., Ltd. | — | — | 0 |
| AS7673JP | ALLES - ejworks corporation | — | — | 0 |
| AS4734JP | AS4734-52 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS4684JP | NTTPC - NTT PC Communications, Inc. | — | — | 0 |
| AS23812JP | AS23812-40 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS37984JP | CKADMIN-AS-JP - Chikushi Jogakuen University, Non-transit AS. | — | — | 0 |
| AS37899JP | NTTW-NGN-AS - NIPPON TELEGRAPH AND TELEPHONE WEST CORPORATION | — | — | 0 |
| AS55889JP | BITISLE-WEST - Equinix Japan Enterprise K.K. | — | — | 0 |
| AS147311JP | NGNJC-AS-AP - Nevigate Global Network Japan Corporation | — | — | 0 |
| AS151027JP | TAO_SAO_PAULO3 - AT&T TAO Cloud Access Node | — | — | 0 |
| AS55375JP | SI-NET - SmartInsight Inc. | — | — | 0 |