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.
1,300 autonomous systems registered to Japan. Click an AS for detail.
| 668 |
| AS17506JP | UCOM - ARTERIA Networks Corporation | 5.5M | 41 |
| AS2497JP | IIJ - Internet Initiative Japan Inc. | 4M | 236 |
| AS2527JP | So-net - Sony Network Communications Inc. | 3.9M | 76 |
| AS2518JP | BIGLOBE - BIGLOBE Inc. | 3.7M | 35 |
| AS17511JP | OPTAGE - OPTAGE Inc. | 3M | 68 |
| 256 |
| 11 |
| 6 |
| AS55949JP | TECHNOPROHOLDINGS-JP - Technopro Holdings | 256 | — | 1 |
| AS131156JP | LAC-AS - LAC Co., Ltd. | 256 | 1 | 2 |
| AS59106JP | INET6 - Cyber and Internet Association | 256 | 65.5K | 2 |
| AS150357JP | SUN-SECBASE - University of Nagasaki | 256 | 1 | 2 |
| AS37905JP | BRASTEL-NET - Brastel Co.,Ltd | 256 | — | 1 |
| AS131964JP | CYBERHOME3 - FAMILYNET JAPAN CORPORATION | 256 | 1 | 2 |
| AS62184JP | MNO-AS Michal Nowak | 256 | 1 | 2 |
| AS140501JP | ITIVITI-AS-AP - Itiviti Japan K.K. | 256 | — | 1 |
| AS23833JP | MARUSAN-NET - Marusan Securities Co., LTD. | 256 | — | 1 |
| AS134827JP | EYJAPAN-AS-AP - EY Japan Co., Ltd. | 256 | — | 1 |
| AS131989JP | PFU-UMC-MS01 - PFU LIMITED | 256 | — | 1 |
| AS23642JP | OBIS - OBIS | 256 | 1 | 2 |
| AS59128JP | KMC - Kyoto University Microcomputer Club | 256 | 1 | 2 |
| AS45678JP | AAC-JP-AS - ABN AMRO Clearing Tokyo Co., Ltd. | 256 | — | 1 |
| AS9609JP | BBIX-CDN - BBIX, Inc. | 256 | 1 | 2 |
| AS152860JP | GJW-KK - GANJINGWORLD K.K. | — | 1 | 1 |
| AS218871JP | NISHIO-AS Kazuto Nishio | — | 16 | 1 |
| AS9375JP | AS9375-27 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS17517JP | AS17517-15 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS9743JP | NIPPONEDUIX-AS-AP - Nippon EDUIX | — | 1 | 1 |
| AS7669JP | AS7669-10 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS138181JP | HEXHU - Hu's Tech LLC | — | 3 | 2 |
| AS199767JP | DOVE-AS Pinjia Zhao | — | 256 | 1 |
| AS138038JP | WOLFLAB-AS-AP - Wolf Network Lab | — | 1 | 1 |
| AS24121JP | ASN-EQIX-OSAKA-AP - Equinix Asia Pacific | — | 512 | 2 |
| AS9369JP | AS9369-21 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS9598JP | MPLS-OCN - NTT DOCOMO BUSINESS,Inc. | — | — | 0 |
| AS10020JP | AS10020-31 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS219065JP | CYH-AS CHENGYUAN HE | — | 16 | 1 |
| AS215239JP | SHOW Show Corporation | — | 512 | 2 |
| AS56218JP | QGPOP-AS-AP - QGPOP | — | 65.5K | 1 |
| AS38646JP | BENKYO-NET - Neodyland | — | 1 | 1 |
| AS9380JP | CNCI-AS - Community Network Center Inc. | — | — | 0 |
| AS9359JP | AS9359-11 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS63778JP | BGPNAP2 - Border Gateway Protocol Network Analysis Project | — | 327.7K | 31 |
| AS201345JP | Shuma-Watanabe Shuma Watanabe | — | 261 | 3 |
| AS150314JP | RIVULETNETWORKS-AS-AP - Rivulet Networks | — | 1 | 1 |
| AS214772JP | NAZUKI-AS CHEN LUOAN | — | 16 | 1 |
| AS214430JP | xronos Takahiro Fukushima | — | 512 | 2 |
| AS7681JP | AS7681-22 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS199436JP | A-NET BangLong Yang | — | 285 | 12 |
| AS45681JP | SHOW - Show Corporation | — | 512 | 2 |
| AS138986JP | WINDCLOUDNETWORK-MO - INAP Japan Tokyo Shiohama DC | — | 16 | 1 |
| AS213471JP | IPPNOC YAMAMOTO Hiroshi | — | 129 | 6 |
| AS140868JP | TAKATASDCC-AS-AP - TakataSDCC Net | — | 2 | 2 |
| AS215871JP | XTOM-JP xTom Japan Corporation | — | 524.3K | 1 |