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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 |
| 1K |
| — |
| 3 |
| AS55393JP | MIDOKURA - Midokura Japan K.K. | 1K | — | 4 |
| AS131963JP | MCDR-KIX - MC Digital Realty, Inc. | 1K | 65.5K | 2 |
| AS7660JP | APAN-JP - Asia Pacific Advanced Network - Japan | 1K | 8.4K | 4 |
| AS18279JP | BUKKYO-U - Bukkyo University | 1K | — | 1 |
| AS133476JP | FIRST-AS-AP - First Innovation K.K. | 1K | — | 1 |
| AS55891JP | WBTSJP-AS - WATCH TOWER BIBLE AND TRACT SOCIETY | 1K | 133.6K | 13 |
| AS138033JP | BBIX-AS-AP - BBIX, Inc | 1K | 65.5K | 5 |
| AS131953JP | YUTOPIA-NET - NPO Yutopianet | 1K | — | 3 |
| AS212259JP | ASTRIX-EU Astrix Co., Ltd. | 1K | 65.5K | 4 |
| AS55382JP | HOT-CHA - Nagato city office | 1K | — | 1 |
| AS151388JP | SE-JIKKEN-AS - SoftEther Corporation (SE-JIKKEN-AS) | 1K | 514 | 8 |
| AS401474JP | ENXO-NET-AS - ENXO LLC | 1K | — | 4 |
| AS63801JP | DODO-NET - DODO K.K. | 1.3K | — | 4 |
| AS131900JP | DIRECTORZ - Directorz Co.,Ltd. | 1.3K | 1 | 5 |
| AS142165JP | BOSCHCORPORATION-AS-AP - Bosch Corporation | 1.3K | 65.5K | 5 |
| AS18072JP | STREAMWING - NTT DOCOMO BUSINESS, Inc. | 1.3K | — | 5 |
| AS24291JP | MITSUI-NW - MITSUI & CO., LTD. | 1.3K | — | 4 |
| AS7674JP | GOFORS - NTT DOCOMO BUSINESS, Inc | 1.3K | 1 | 4 |
| AS37904JP | BBIX-NETWORK - BBIX, Inc. | 1.3K | 1 | 4 |
| AS152324JP | M3XNETCOLTD-AS-AP - 3XNET Co., Ltd. | 1.3K | — | 5 |
| AS59129JP | LOGICLINKS - LogicLinks, Inc. | 1.3K | — | 3 |
| AS131912JP | CYBOZU - Cybozu,Inc. | 1.3K | 65.5K | 3 |
| AS131917JP | TOSHIBA-IS - Toshiba I.S. corp | 1.3K | — | 5 |
| AS63773JP | DUAL-NET - dual&Co. Inc. | 1.3K | 65.5K | 4 |
| AS7667JP | KDDLAB - KDDI Research, Inc. | 1.3K | 65 | 4 |
| AS7500JP | M-ROOT-DNS - WIDE Project | 1.3K | 65.5K | 5 |
| AS148985JP | ANSYSJAPANKK-AS-AP - ANSYS Japan K.K. | 1.3K | — | 4 |
| AS146979JP | SUNDAICHI - University of Nagasaki | 1.3K | 1 | 6 |
| AS150367JP | CLOUD-NET - Future Corp. | 1.5K | — | 6 |
| AS18123JP | SEIRYO - INAOKI EDUCATIONAL INSTITUTION | 1.5K | 1 | 3 |
| AS18258JP | MS-JP-AS-AP - Morgan Stanley Japan Limited | 1.5K | — | 6 |
| AS54415JP | WIZ-JP-AS-AP - WIZ K.K. | 1.5K | 7 | 13 |
| AS131910JP | SORACOM - SORACOM. INC. | 1.5K | 65.5K | 4 |
| AS131982JP | UBC - Uenohara Broadband Communications Inc. | 1.5K | 65.5K | 3 |
| AS7527JP | JPIX - Japan Internet Xing Co., Ltd. | 1.5K | 65.5K | 3 |
| AS51044JP | RHE Kazuki Yamaguchi | 1.5K | 131.1K | 21 |
| AS131966JP | INET-NET - I-NET CORP. | 1.5K | — | 2 |
| AS63789JP | NEXT-WEB - NeXtWEB Corporation | 1.5K | — | 3 |
| AS37893JP | TRADEWEB-TKO - Tradeweb Japan | 1.5K | — | 5 |
| AS24280JP | HIS-TKIDC - Hitachi Systems, Ltd. | 1.5K | — | 2 |
| AS133203JP | SBIBITS-JP - SBI BITS Co., Ltd. | 1.5K | — | 5 |
| AS18139JP | HISOL-CSV - Hitachi Solutions, Ltd. | 1.5K | 65.5K | 7 |
| AS24257JP | JPIX-64ES - Japan Internet Xing Co., Ltd. | 1.5K | 3 | 8 |
| AS55888JP | Nintatsu - Nintatsu Global Telecommunications Corporation | 1.7K | — | 6 |
| AS131914JP | DD-NET - Rakuten Group, Inc. | 1.8K | — | 5 |
| AS139345JP | HYVEMANAGEDHOSTINGCORPINC-AS-AP - Hyve Managed Hosting Corp Inc | 1.8K | 7 | 7 |