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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 |
| AS7515JP | GIN-NTTLJ - NTT Ltd Japan Corporation | — | — | 0 |
| AS152925JP | NARIYASUSANGYOKK-AS-AP - Nariyasu Sangyo Co., Ltd. | — | — | 0 |
| AS131906JP | GAPINC-NET - Gap Japan K.K. | — | — | 0 |
| AS23779JP | N-BONE - NTT DOCOMO BUSINESS, Inc. | — | — | 0 |
| AS37982JP | KIRINKK-AS-AP - Kirin K.K. | — | — | 0 |
| AS23823JP | AS23823-51 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS2521JP | AS2521-25 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS58646JP | FBDC-B - FreeBit Co.,Ltd. | — | — | 0 |
| AS37927JP | NOMURATRADE - Nomura Researth Institute, Ltd. | — | — | 0 |
| AS4696JP | AS4696-14 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS23794JP | BMCDN - Broadmedia Corporation | — | — | 0 |
| AS45846JP | FSW-Shiga-POP - Shiga area POP AS Number | — | — | 0 |
| AS23813JP | SORUN - SORUN Corporation | — | — | 0 |
| AS18080JP | SOPIA - Sopiafons Co.,Ltd | — | — | 0 |
| AS17526JP | AS17526-24 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS4701JP | AS4701-19 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS7507JP | AS7507-8 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS4719JP | J-Stream-4 - J-Stream Inc. | — | — | 0 |
| AS17504JP | NETCOM - NRI Netcom, Ltd. | — | — | 0 |
| AS46953JP | INCLEAF - FENGYE INC | — | — | 0 |
| AS2502JP | TRAIN - The University of Tokyo | — | — | 0 |
| AS4705JP | AS4705-23 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS152862JP | SOLTIEND - Shiojiri City | — | — | 0 |
| AS4687JP | AS4687-5 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS63787JP | AS63787-18 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS45676JP | AS45676-5 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS58792JP | closip-1 - closip Inc. | — | — | 0 |
| AS131908JP | Intec-DCAN - INTEC Inc. | — | — | 0 |
| AS7526JP | MIND-US - Mitsubishi Electric Information Network Corporation | — | — | 0 |
| AS9996JP | KDDIIP-VPN - KDDI Corporation | — | — | 0 |
| AS9592JP | PRISM - SOFTBANK TELECOM Corp. | — | — | 0 |
| AS23806JP | HBS - Chupicom Inc. | — | — | 0 |
| AS7661JP | AS7661-2 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS17528JP | AS17528-26 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS9620JP | AS9620-30 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS4716JP | POWEREDCOM - KDDI CORPORATION | — | — | 0 |
| AS23636JP | AS23636-25 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS24266JP | AS24266-19 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS7510JP | AS7510-11 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS4689JP | AS4689-7 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS4706JP | AS4706-24 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS151013JP | TAO_LONDON - AT&T TAO Cloud Access Node | — | — | 0 |
| AS150365JP | LL-NET - LifeLink Co.,Ltd | — | — | 0 |
| AS63000JP | US-CORE - Auk LLC | — | — | 0 |
| AS152872JP | VL-NET - VirtualLink Networks | — | — | 0 |
| AS63796JP | AS63796-27 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |