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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.
1,300 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 |
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| 0 |
| AS4701JP | AS4701-19 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS138515JP | TAO_TORONTO - AT&T TAO Cloud Access Node | — | — | 0 |
| AS131106JP | DATAHOTEL-JP - AS for DATAHOTEL, which is one of iDC in Japan, | — | — | 0 |
| AS131973JP | JST-Fukuoka - J-Stream Inc. | — | — | 0 |
| AS131968JP | MHBK-CLH-OS - Mizuho Bank, Ltd | — | — | 0 |
| AS138328JP | SASMFL-AS-AP - Skadden, Arps, Slate, Meagher & Flom LLP | — | — | 0 |
| AS9379JP | AS9379-31 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS45674JP | MIDORI - BIGLOBE Inc. | — | — | 0 |
| AS55893JP | HOKEN-NET - NTT DATA CORPORATION | — | — | 0 |
| AS23885JP | ORACLEV6-AS-AP - Oracle Corporation | — | — | 0 |
| AS7526JP | MIND-US - Mitsubishi Electric Information Network Corporation | — | — | 0 |
| AS17673JP | MKInet - MITSUI KNOWLEDGE INDUSTRY CO., LTD. | — | — | 0 |
| AS24292JP | AS24292-45 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS7510JP | AS7510-11 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS9360JP | AS9360-12 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS151022JP | TAO_SYDNEY3 - AT&T TAO Cloud Access Node | — | — | 0 |
| AS17930JP | AS17930-1 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS55905JP | COMZNET2 - TOP CLOUD Inc. | — | — | 0 |
| AS18067JP | HUMEIA - Humeia Corporation | — | — | 0 |
| AS18080JP | SOPIA - Sopiafons Co.,Ltd | — | — | 0 |
| AS4681JP | AS4681-10 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS23626JP | AS23626-15 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS9620JP | AS9620-30 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS18273JP | AS18273-15 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS3391JP | ERX-ASCII-NET - ASCIInet Corporation | — | — | 0 |
| AS9994JP | AS9994-5 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS7528JP | AS7528-29 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS9610JP | AS9610-20 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS140683JP | STARBOWLTD-AS-AP - Starbow Ltd. | — | — | 0 |
| AS153360JP | NRAYN-AS-AP - Net Reliability Association | — | — | 0 |
| AS151035JP | TAO_LONDON - AT&T TAO Cloud Access Node | — | — | 0 |
| AS7673JP | ALLES - ejworks corporation | — | — | 0 |
| AS17528JP | AS17528-26 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS17690JP | AS17690-18 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS131908JP | Intec-DCAN - INTEC Inc. | — | — | 0 |
| AS136796JP | CL-JP-AS - CORELINK JAPAN | — | — | 0 |
| AS134703JP | JCIX - Japan Community IX Association | — | — | 0 |
| AS7683JP | TRUNK-AS - trunk inc. | — | — | 0 |
| AS24274JP | AS24274-27 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS4726JP | AS4726-44 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS132373JP | ASIAN-WEB-JP - Neomet Aoyama BLDG.3F 2-7-13 Shibuya | — | — | 0 |
| AS4676JP | AS4676-5 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS37927JP | NOMURATRADE - Nomura Researth Institute, Ltd. | — | — | 0 |
| AS45676JP | AS45676-5 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS17959JP | AS17959-30 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS137407JP | EICINC-AS-AP - EIC INC | — | — | 0 |