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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 |
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| 0 |
| AS9360JP | AS9360-12 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS9928JP | INIXP-ASIA-AS-AP - Rapid-Firey (INIXP Asia) | — | — | 0 |
| AS151065JP | AS-VMW-BKK - VMWare Incorporation | — | — | 0 |
| AS132373JP | ASIAN-WEB-JP - Neomet Aoyama BLDG.3F 2-7-13 Shibuya | — | — | 0 |
| AS63787JP | AS63787-18 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS4712JP | JT-Net - JAPAN TOBACCO INC. | — | — | 0 |
| AS131082JP | JPIX-4 - Japan Internet Xing Co., Ltd. | — | — | 0 |
| AS24567JP | QTINC-AS-AP - QT Inc. | — | — | 0 |
| AS133229JP | SKIPLLC-AS-AP - SKIP LLC | — | — | 0 |
| AS146970JP | BBS - BBSakura Networks, Inc. | — | — | 0 |
| AS131154JP | SHOWNET-4AS - NANO OPT Media, Inc. | — | — | 0 |
| AS151015JP | TAO_FRANKFURT - AT&T TAO Cloud Access Node | — | — | 0 |
| AS24294JP | AS24294-47 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS63796JP | AS63796-27 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS7518JP | AS7518-19 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS9610JP | AS9610-20 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS4724JP | AS4724-42 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS38630JP | AS38630-4 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS7683JP | TRUNK-AS - trunk inc. | — | — | 0 |
| AS4708JP | AS4708-26 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS131078JP | KDDLAB-4OCT - KDDI Research, Inc. | — | — | 0 |
| AS9377JP | AS9377-29 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS150355JP | BBIX-MAPSRS - BBIX,Inc. | — | — | 0 |
| AS151035JP | TAO_LONDON - AT&T TAO Cloud Access Node | — | — | 0 |
| AS24056JP | SINGTEL-EXPAN-JP - Internet Data Centre | — | — | 0 |
| AS151602JP | UTC-AS-AP - UD Trucks Corporation | — | — | 0 |
| AS18073JP | AS18073-7 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS400593JP | TRIDATA - tricloud | — | — | 0 |
| AS147311JP | NGNJC-AS-AP - Nevigate Global Network Japan Corporation | — | — | 0 |
| AS17692JP | KCCS - Kyocera Communication Systems Co., Ltd. | — | — | 0 |
| AS152150JP | MENLO-SEC-JP - Menlo Security Japan K.K. | — | — | 0 |
| AS18084JP | TELSTRAGLOBAL - Telstra Global Internet Services Network Blocks | — | — | 0 |
| AS10007JP | IPR - SoftBank Corp. | — | — | 0 |
| AS17702JP | AS17702-30 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS132592JP | STARCOLTD-AS-AP - Star Co,.Ltd. | — | — | 0 |
| AS4672JP | AS4672-1 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS59114JP | RECRUIT - Recruit Co., Ltd. | — | — | 0 |
| AS9363JP | FNETS - FUJITSU NETWORK SOLUTIONS LIMITED | — | — | 0 |
| AS151036JP | TAO_SHANGHAI - AT&T TAO Cloud Access Node | — | — | 0 |
| AS2554JP | IDCF2554 - IDC Frontier Inc. | — | — | 0 |
| AS17952JP | AS17952-23 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS18079JP | AS18079-13 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS9368JP | AS9368-20 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS18082JP | LASDEC - Japan Agency for Local Authority Information Systems | — | — | 0 |
| AS17688JP | AS17688-16 - JPNIC-2Byte-ASBLOCK-AP | — | — | 0 |
| AS23638JP | AMIXCOM - AMIXCOM Inc. | — | — | 0 |