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.
| AS | Holder | IPv4 | Prefixes |
|---|---|---|---|
| AS17676JP | GIGAINFRA - SoftBank Corp. | 49.7M | 490 |
| AS4713JP | OCN - NTT DOCOMO BUSINESS,Inc. | 28.6M | 189 |
| AS2516JP | KDDI - KDDI CORPORATION | 18.2M | 578 |
| AS9824JP | JTCL-JP-AS - JCOM Co., Ltd. | 10.4M | 297 |
| AS2907JP | SINET-AS - Research Organization of Information and Systems, National Institute of Informatics | 9M | 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 |
Share of announced address space covered by valid Route Origin Authorizations.
1,303 autonomous systems registered to Japan. Click an AS for detail.
| AS | Holder | IPv4 ↓ | IPv6 /48 | Prefixes |
|---|---|---|---|---|
| AS17530JP | NNS - Nihon Network Service Co, .Ltd. | 38.9K | 65.5K | 5 |
| AS59109JP | HITCLOUD - Hitachi,Ltd., Managed & Platform Services Business Division | 38.9K | — | 111 |
| AS23777JP | VIPALETTE - NTT BUSINESS SOLUTIONS CORPORATION | 37.4K | 65.5K | 23 |
| AS10001JP | MICSNET - Mics Network Corporation | 36.9K | 65.5K | 11 |
| AS18075JP | HICAT - Chupicom Inc. | 36.9K | — | 21 |
| AS3258JP | XTOM-JAPAN xTom Japan Corporation | 36.6K | 524.6K | 163 |
| AS59107JP | HTV-NET - Hachinohe Cable Television Co. | 36.1K | — | 69 |
| AS7682JP | HOTNET - HOKKAIDO TELECOMMUNICATIONS NETWORK Co., Inc. | 35.8K | 65.5K | 7 |
| AS38462JP | OCE-AS-AP - Osaki Computer Engineering Co.Ltd | 35.3K | 65.5K | 7 |
| AS23624JP | CHUKAI - Chukai Television Co,.Ltd. | 34.8K | 65.5K | 13 |
| AS9357JP | FNC - NRI SecureTechnologies, Ltd. | 33.5K | 1 | 5 |
| AS59121JP | AKNWS-NET - Asahi Kasei Networks Corporation | 33.3K | — | 3 |
| AS131937JP | JCV - Joetsu Cable Vision | 33.3K | 131.1K | 12 |
| AS58793JP | NIFCLOUD-NET - FUJITSU LIMITED | 33K | 65.5K | 15 |
| AS131915JP | WINDE - Hamamatsu Cable Television .Inc | 32.8K | — | 7 |
| AS18129JP | ONI - OKAYAMA NETWORK INC. | 32.3K | — | 8 |
| AS131916JP | BAYNET - Tokyo Bay Network Co.,Ltd. | 31.7K | 65.5K | 14 |
| AS9607JP | BBTower - BroadBand Tower, Inc. | 31.7K | 132.4K | 25 |
| AS4675JP | U-NETSURF - UNIADEX, LTD. | 31.5K | 65.5K | 8 |
| AS135161JP | GMO-Z-COM-TH - GMO-Z com NetDesign Holdings Co., Ltd. | 31K | 4.1K | 34 |
| AS7668JP | HTCN - Hokuriku Telecommunication Network Co. | 30.2K | 65.5K | 10 |
| AS2915JP | BBIX-OCX - BBIX, Inc. | 29.7K | 65.5K | 9 |
| AS55386JP | FJcloud-West - FUJITSU LIMITED | 29.7K | 3 | 31 |
| AS7677JP | DNP - Dai Nippon Printing Co., Ltd | 28.9K | — | 18 |
| AS10002JP | ICT - IGAUENO CABLE TELEVISION CO.,LTD | 28.7K | 65.5K | 7 |
| AS23629JP | OCTV - Obihiro City Cable Co.,Ltd. | 28.2K | 65.5K | 15 |
| AS9601JP | SHIBATA - Niigata Communication Service | 27.6K | 57.3K | 10 |
| AS24255JP | T-CATV - Koshinomiyako Network, Inc. | 27.6K | 65.5K | 8 |
| AS55394JP | GREE-NET - GREE, Inc. | 27.1K | 65.5K | 9 |
| AS24249JP | JWAY - JWAY co., Ltd. | 26.6K | 65.5K | 9 |
| AS18274JP | UCATV - Utsunomiya Cable TV Corporation | 26.6K | 65.5K | 10 |
| AS10004JP | AS-PHOENIX-J - Phoenix Communications Inc. | 26.4K | 65.5K | 12 |
| AS55381JP | CCSNET - CITY-CABLE SHUNAN Corporation | 26.1K | — | 18 |
| AS131958JP | t-net - Tama Cable Network Co.,Ltd. | 26.1K | 65.5K | 7 |
| AS58650JP | CATVWINK - Warabi Cable Vision Co., Ltd. | 25.6K | — | 12 |
| AS24296JP | YAHOO-2 - LY Corporation | 25.6K | — | 4 |
| AS4723JP | DOLPHIN - Dolphin | 25.6K | — | 5 |
| AS24251JP | ICNTV-NET - Iwakuni Cable Network Corporation | 25.3K | — | 36 |
| AS23661JP | CLARA-AS-AP - CLARA, Inc. | 24.8K | 65.5K | 13 |
| AS59092JP | KRONOS - kronos.Co.,Ltd. | 24.6K | — | 14 |
| AS17950JP | SaiNet-AS - SaiNet | 24.6K | — | 2 |
| AS17682JP | CABLENET296 - 296 BROAD NET Com Inc | 23.6K | 65.8K | 13 |
| AS18121JP | INCL - Ishikawa Computer Center Co.,LTD. | 23.3K | 65.5K | 7 |
| AS23786JP | MABLE - San-in Cable Vision CO.,LTD | 22.5K | 65.5K | 6 |
| AS23778JP | CANET - IMIZU CABLE NETWORK CO.,LTD. | 22.5K | 65.5K | 11 |
| AS131923JP | MCAT - MCAT Ltd. | 22.5K | 65.5K | 11 |
| AS18094JP | TCN-AS - Tokyo Cable Network.,INC | 22K | — | 6 |
| AS131925JP | CYBERHOME2 - FAMILY NET JAPAN INCORPORATED | 21.8K | 393.2K | 13 |
| AS134351JP | LEASEWEB-AS-AP - Leaseweb Japan K.K. | 21.8K | 65.5K | 55 |
| AS24259JP | BC9 - kanuma cable television Corporation | 21.5K | 65.5K | 15 |