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.
1,303 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. | 4.2M | 269 |
| AS2527JP | So-net - Sony Network Communications Inc. | 3.9M | 76 |
| AS2518JP | BIGLOBE - BIGLOBE Inc. | 3.7M | 35 |
| AS17511JP | OPTAGE - OPTAGE Inc. | 3M | 68 |
| 2K |
| 65.5K |
| 3 |
| AS131907JP | IWAMI-NET - Iwami Cablevision Co.,Ltd. | 2K | — | 4 |
| AS133458JP | FSCJCL-AS-AP - FPT Smart Cloud Japan Co., Ltd | 2K | 257 | 8 |
| AS59095JP | ACCELIA-W - ACCELIA | 2K | — | 1 |
| AS55383JP | IDC-JP - YYY Group, Inc. | 2K | — | 8 |
| AS18076JP | WCE-IAMAS - Institute of Advanced Media Arts and Sciences | 2K | — | 1 |
| AS131969JP | SSC-2 - Suzuyo Shinwart Corporation | 2K | 258 | 6 |
| AS131961JP | DOKKYO-AS - Dokkyo University | 2K | — | 3 |
| AS131899JP | DIG-NET - DIG Inc. | 2K | — | 8 |
| AS63774JP | KAMOIKE-NET - Kamoike.net LLP | 2K | 65.5K | 12 |
| AS131901JP | fidessa-kk - FIDESSA KK | 2K | — | 3 |
| AS59122JP | R-SYS - Ranger-Systems Co., Ltd. | 2K | — | 2 |
| AS24512JP | HAL-Internet - HAL Internet, Internet Service Provider, Tottori, Japan | 2K | — | 1 |
| AS37912JP | IPRIO-JP - IPRIO Corporation. | 2K | 65.5K | 2 |
| AS152858JP | TWC-NET - Woven by Toyota, Inc. | 2K | 131.1K | 6 |
| AS131944JP | KADOKAWA-NET - KADOKAWA DWANGO CORPORATION | 2K | — | 8 |
| AS131986JP | BB4U-NET - ITOCHU Cable Systems Corp. | 2K | 65.5K | 4 |
| AS23633JP | LOCAL-IX - Niigata Communication Service | 2K | — | 1 |
| AS24290JP | HEARTNET - Heart Network Co.,LTD | 2K | — | 1 |
| AS131904JP | CYBERFEELINC-JP - Cyber Feel Inc. | 2K | — | 7 |
| AS136506JP | LEONCOLTD-AS-AP - LEON CO.LTD | 2K | — | 8 |
| AS58784JP | RIS - Rissho University | 2K | — | 1 |
| AS24262JP | HIcom - HAMANASU INFORMATION Co., Ltd. | 2K | 65.5K | 2 |
| AS24250JP | MC-IDC - Miyagin Digital Solutions Co.,Ltd. | 2K | — | 1 |
| AS131939JP | IPSISM-NET - IPS INC | 2K | — | 5 |
| AS131971JP | AS131971-67 - JPNIC-4Byte-ASBLOCK-AP | 2K | 65.5K | 12 |
| AS23826JP | DAIDO-IT - Daido University | 2K | — | 3 |
| AS37915JP | Ke-net - Wakayama Prefectural Government | 2K | — | 1 |
| AS38642JP | YOSHIZOU - Yoshizou XYZ Solutions | 2K | — | 1 |
| AS18091JP | TEIKYO-U - Teikyo University | 2K | — | 3 |
| AS24253JP | J-Stream - J-Stream Inc. | 2.3K | 65.5K | 3 |
| AS141757JP | ZJC-AS-AP - Zoho Japan Corporation | 2.3K | 2 | 9 |
| AS23818JP | JETINTERNET - JETINTERNET Corporation | 2.3K | — | 6 |
| AS131955JP | KCNET - Kyoutou Cable Net Co Ltd | 2.6K | — | 3 |
| AS23632JP | TVT-NET - TVT Tsuyama Co.,Ltd. | 2.6K | — | 2 |
| AS59103JP | SOFTETHER - SoftEther Corporation | 2.6K | 21K | 17 |
| AS58789JP | DUNAMIS - DUNAMIS Co.,Ltd | 2.6K | — | 10 |
| AS151378JP | CSAISON-NET - Credit SAISON Co., Ltd. | 2.6K | — | 3 |
| AS63779JP | JUSTPLAYER - InfiniCloud Co. Ltd. | 2.6K | — | 2 |
| AS59105JP | HOMENOC - Home NOC Operators Group | 2.6K | 65.5K | 6 |
| AS55898JP | YAHOO-CORP - LY Corporation | 2.6K | 65.5K | 6 |
| AS7530JP | BBTower-Lab - BroadBand Tower, Inc. | 2.6K | 65.5K | 4 |
| AS131941JP | ENTSU-NET - Entsu Co.,Ltd. | 2.6K | — | 6 |
| AS7663JP | FFNET - FUJI NEXTERA LABO INC. | 2.8K | — | 11 |
| AS131957JP | MicroAd - MicroAd, Inc. | 2.8K | 65.5K | 6 |
| AS59129JP | LOGICLINKS - LogicLinks, Inc. | 2.8K | — | 9 |
| AS58648JP | AT-I-NET - AT-I, Inc. | 2.8K | — | 7 |