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 | 205 |
| AS2527JP | So-net - Sony Network Communications Inc. | 3.9M | 76 |
| AS2518JP | BIGLOBE - BIGLOBE Inc. | 3.7M | 36 |
| AS17511JP | OPTAGE - OPTAGE Inc. | 3M | 67 |
| — |
| — |
| 0 |
| AS37895JP | RYUKOKU - Ryukoku University | — | — | 0 |
| AS131922JP | LN-NET - leafnet Co.,Ltd. | — | — | 0 |
| AS18280JP | AS18280-22 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS17949JP | TEU - Tokyo University of Technorogy | — | — | 0 |
| AS24293JP | AS24293-46 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS45681JP | SHOW - Show Corporation | — | 512 | 2 |
| AS201345JP | Shuma-Watanabe Shuma Watanabe | — | 261 | 3 |
| AS213471JP | IPPNOC YAMAMOTO Hiroshi | — | 179 | 11 |
| AS9743JP | NIPPONEDUIX-AS-AP - Nippon EDUIX | — | 1 | 1 |
| AS18139JP | HISOL-CSV - Hitachi Solutions, Ltd. | — | 65.5K | 1 |
| AS140868JP | TAKATASDCC-AS-AP - TakataSDCC Net | — | 2 | 2 |
| AS9359JP | AS9359-11 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS9369JP | AS9369-21 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS7681JP | AS7681-22 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS17945JP | iTV - iTV Co,Ltd | — | — | 0 |
| AS18269JP | KAI - Kai Creates Inc. | — | — | 0 |
| AS23800JP | AS23800-28 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS150298JP | MORE-WAIFU-BACKBONE - More Waifu Backbone | — | — | 0 |
| AS17526JP | AS17526-24 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS138515JP | TAO_TORONTO - AT&T TAO Cloud Access Node | — | — | 0 |
| AS2509JP | AS2509-13 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS151033JP | TAO_MUMBAI2 - AT&T TAO Cloud Access Node | — | — | 0 |
| AS151195JP | NGIKK-AS-AP - Nova Global ICT Kabushiki Kaisha | — | — | 0 |
| AS210717JP | RIVE3-NET Masanori Sunagawa | — | — | 0 |
| AS4728JP | AS4728-46 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS4732JP | DION - KDDI CORPORATION | — | — | 0 |
| AS23612JP | AS23612-1 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS23829JP | AS23829-57 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS56025JP | KARSCOLTD-AS-AP - Kars co.ltd. | — | — | 0 |
| AS56291JP | ACE-AS-AP - Ace, Inc. | — | — | 0 |
| AS151036JP | TAO_SHANGHAI - AT&T TAO Cloud Access Node | — | — | 0 |
| AS4705JP | AS4705-23 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS7619JP | IIJLAB-BACKUP-LINKS-EXP - Internet Initiative Japan, Inc. | — | — | 0 |
| AS131157JP | MAGMA-IPV6 - IMS Corporation | — | — | 0 |
| AS24269JP | AS24269-22 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS59100JP | kochi-gc - Kochi Gakuen College | — | — | 0 |
| AS24265JP | Agilit - NTT DOCOMO BUSINESS, Inc. | — | — | 0 |
| AS131155JP | HANABI4 - NTT DOCOMO BUSINESS, Inc. | — | — | 0 |
| AS38632JP | XCON - cross-connect niigata co.,ltd. | — | — | 0 |
| AS59113JP | RJV6-NET - RICOH JAPAN Corporation | — | — | 0 |
| AS152862JP | SOLTIEND - Shiojiri City | — | — | 0 |
| AS4706JP | AS4706-24 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS17504JP | NETCOM - NRI Netcom, Ltd. | — | — | 0 |
| AS4704JP | SANNET - Rakuten Mobile, Inc. | — | — | 0 |
| AS23622JP | TSURU-GAKUEN - Tsuru Gakuen | — | — | 0 |
| AS23638JP | AMIXCOM - AMIXCOM Inc. | — | — | 0 |