2,700 blocks registered in Japan.

🇯🇵 Cosmo Techs Co., Ltd. 00:0F:1D:00:00:00 /24 MA-L 🇯🇵 COSMOS web Co., Ltd. 70:B3:D5:3E:80:00 /36 MA-S 🇯🇵 COTEAU VERT CO., LTD. 00:11:16:00:00:00 /24 MA-L 🇯🇵 Coup Corporation 00:07:E5:00:00:00 /24 MA-L 🇯🇵 COVAX Co. Ltd 00:1C:6B:00:00:00 /24 MA-L 🇯🇵 Covia, Inc. 00:24:6B:00:00:00 /24 MA-L 🇯🇵 COWBELL ENGINEERING CO., LTD. 00:1C:DD:00:00:00 /24 MA-L 🇯🇵 CPSpeed co., ltd. 74:A2:35:A0:00:00 /28 MA-M 🇯🇵 Crane-elec. Co., LTD. 70:B3:D5:1F:B0:00 /36 MA-S 🇯🇵 Creative Next Design F0:2A:23:00:00:00 /24 MA-L 🇯🇵 CS Services Co.,Ltd. 38:C7:BA:00:00:00 /24 MA-L 🇯🇵 CSK CORPORATION 00:80:0B:00:00:00 /24 MA-L 🇯🇵 CSP Frontier Technologies,Inc. 00:1C:60:00:00:00 /24 MA-L 🇯🇵 CSUN System Technology Co.,LTD BC:39:A6:00:00:00 /24 MA-L 🇯🇵 Cyber Solutions Inc. 00:1A:B2:00:00:00 /24 MA-L 🇯🇵 Cyber Trans Japan Co.,Ltd. 84:A9:91:00:00:00 /24 MA-L 🇯🇵 CyberCraft 00:50:C2:C9:60:00 /36 IAB 🇯🇵 Cyberdyne Inc. 00:22:06:00:00:00 /24 MA-L 🇯🇵 CYBERNETICS TECH. CO., LTD. 00:30:68:00:00:00 /24 MA-L 🇯🇵 CyberneX Co., Ltd 8C:1F:64:A6:D0:00 /36 MA-S 🇯🇵 CYQ've Technology Co., Ltd. 00:10:37:00:00:00 /24 MA-L 🇯🇵 CyVerse Corporation 00:1E:2C:00:00:00 /24 MA-L 🇯🇵 D&M Holdings Inc. 00:05:CD:00:00:00 /24 MA-L 🇯🇵 D&M Holdings Inc. 00:06:78:00:00:00 /24 MA-L 🇯🇵 D&M Holdings Inc. 8C:A9:6F:00:00:00 /24 MA-L 🇯🇵 d-broad,INC 8C:5C:A1:00:00:00 /24 MA-L 🇯🇵 DAC ENGINEERING CO., LTD. 00:22:47:00:00:00 /24 MA-L 🇯🇵 Dai Nippon Printing Co., Ltd 00:12:B1:00:00:00 /24 MA-L 🇯🇵 Daiden Co., Ltd. 00:03:3C:00:00:00 /24 MA-L 🇯🇵 Daido Signal Co., Ltd. 00:25:28:00:00:00 /24 MA-L 🇯🇵 Daifuku CO., Ltd. 70:B3:D5:3A:20:00 /36 MA-S 🇯🇵 Daifuku CO., Ltd. 8C:1F:64:99:70:00 /36 MA-S 🇯🇵 Daihen Corporation 00:07:4B:00:00:00 /24 MA-L 🇯🇵 Daiichi Electric Industry Co., Ltd 8C:1F:64:80:20:00 /36 MA-S 🇯🇵 DAIICHI ELECTRONICS CO., LTD. 00:0B:01:00:00:00 /24 MA-L 🇯🇵 DAIICHI-DENTSU LTD. 00:1F:98:00:00:00 /24 MA-L 🇯🇵 DAIKIN INDUSTRIES, LTD. 00:80:4F:00:00:00 /24 MA-L 🇯🇵 DAIKO ELECTRIC CO.,LTD 6C:2A:DF:20:00:00 /28 MA-M 🇯🇵 DAIKOKU DENKI CO.,LTD. 4C:E1:73:60:00:00 /28 MA-M 🇯🇵 Dainichi Denshi　Co.,LTD 70:B3:D5:8C:F0:00 /36 MA-S 🇯🇵 DAINIPPON PHARMACEUTICAL CO., LTD. 00:15:5A:00:00:00 /24 MA-L 🇯🇵 Daisen Electronic Industrial Co., Ltd. 5C:F2:86:E0:00:00 /28 MA-M 🇯🇵 daishin 04:EE:E8:C0:00:00 /28 MA-M 🇯🇵 DAISHIN-DENSHI Co., Ltd 00:50:C2:AC:10:00 /36 IAB 🇯🇵 Data Controls Inc. 68:F1:25:00:00:00 /24 MA-L 🇯🇵 Data East Corporation 00:0A:3F:00:00:00 /24 MA-L 🇯🇵 DATA LINK CORP. LTD. 00:C0:84:00:00:00 /24 MA-L 🇯🇵 Data Technology Inc. 48:65:EE:30:00:00 /28 MA-M 🇯🇵 DDL 00:50:C2:A1:A0:00 /36 IAB 🇯🇵 DDL Co,.ltd. 00:C1:4F:00:00:00 /24 MA-L 🇯🇵 DEICY CORPORATION 00:14:1A:00:00:00 /24 MA-L 🇯🇵 DENGYOSHA co.,LTD. 00:50:C2:48:F0:00 /36 IAB 🇯🇵 Denki Kogyo Company, Limited 00:1B:C5:0B:90:00 /36 MA-S 🇯🇵 DENSAN CO., LTD. 00:00:CC:00:00:00 /24 MA-L 🇯🇵 DENSEI COMMUNICATION Inc. 00:50:C2:F3:F0:00 /36 IAB 🇯🇵 Denshijiki Industry Co.,Ltd F4:A4:54:50:00:00 /28 MA-M 🇯🇵 DENSITRON TAIWAN LTD. 00:20:DC:00:00:00 /24 MA-L 🇯🇵 DENSO Co.,Ltd 0C:01:C8:00:00:00 /24 MA-L 🇯🇵 DENSO CORPORATION 00:C0:59:00:00:00 /24 MA-L 🇯🇵 DENSO CORPORATION 18:95:78:00:00:00 /24 MA-L 🇯🇵 DENSO CORPORATION BA:FE:3A:00:00:00 /24 CID 🇯🇵 DEP Corp. 64:E1:61:00:00:00 /24 MA-L 🇯🇵 Device Drivers Limited 00:0E:6C:00:00:00 /24 MA-L 🇯🇵 Dialog Inc. 00:0F:AF:00:00:00 /24 MA-L 🇯🇵 Diatech co.,ltd. 8C:1F:64:26:C0:00 /36 MA-S 🇯🇵 Diatrend Corporation 1C:82:59:20:00:00 /28 MA-M 🇯🇵 DIC Corporation 70:B3:D5:5C:30:00 /36 MA-S 🇯🇵 DIGI I'S LTD 58:76:C5:00:00:00 /24 MA-L 🇯🇵 DIGITAL HANDS CO.,LTD. 00:08:81:00:00:00 /24 MA-L 🇯🇵 Digital Media Professionals 70:B3:D5:BC:40:00 /36 MA-S 🇯🇵 Digital Sky Corporation 00:1D:17:00:00:00 /24 MA-L 🇯🇵 digital-spice 70:B3:D5:AF:F0:00 /36 MA-S 🇯🇵 Diretta 70:B3:D5:C9:00:00 /36 MA-S 🇯🇵 Disco Corporation 00:05:48:00:00:00 /24 MA-L 🇯🇵 Diskware Co., Ltd 00:13:DA:00:00:00 /24 MA-L 🇯🇵 dit Co., Ltd. 00:E0:25:00:00:00 /24 MA-L 🇯🇵 Dmet Products Corp. 7C:EB:7F:00:00:00 /24 MA-L 🇯🇵 DMG MORI Digital Co., LTD 00:80:B8:00:00:00 /24 MA-L 🇯🇵 DNESO TEN Ltd. B0:FD:0B:60:00:00 /28 MA-M 🇯🇵 DoCoMo Systems, Inc. 00:19:60:00:00:00 /24 MA-L 🇯🇵 Dokuen Co. Ltd. 70:B3:D5:33:40:00 /36 MA-S 🇯🇵 Doramu Co.,Ltd. 00:50:C2:4A:C0:00 /36 IAB 🇯🇵 dots Inc. 98:AA:FC:C0:00:00 /28 MA-M 🇯🇵 Dream Technologies Corporation 00:15:E3:00:00:00 /24 MA-L 🇯🇵 Dream Ware Inc. 04:1D:10:00:00:00 /24 MA-L 🇯🇵 DSC CORPORATION 00:60:21:00:00:00 /24 MA-L 🇯🇵 dss Co,. Ltd C8:F1:0A:90:00:00 /28 MA-M 🇯🇵 DTS INSIGHT Corporation 00:00:64:00:00:00 /24 MA-L 🇯🇵 DTS INSIGHT Corporation 00:60:41:00:00:00 /24 MA-L 🇯🇵 DTS INSIGHT Corporation D0:0A:AB:00:00:00 /24 MA-L 🇯🇵 Duaxes Corporation 00:19:08:00:00:00 /24 MA-L 🇯🇵 DUX, INC. 00:E0:27:00:00:00 /24 MA-L 🇯🇵 DX Antenna Co., Ltd. 00:02:FA:00:00:00 /24 MA-L 🇯🇵 DX ANTENNA CO.,LTD. A4:6E:A7:00:00:00 /24 MA-L 🇯🇵 Dynamic Solutions Co,.Ltd. 00:0D:79:00:00:00 /24 MA-L 🇯🇵 E-Globaledge Corporation 00:03:10:00:00:00 /24 MA-L 🇯🇵 E-Globaledge Corporation 8C:1F:64:9E:30:00 /36 MA-S 🇯🇵 E-Motion System, Inc. 00:50:C2:AC:50:00 /36 IAB 🇯🇵 E-TEC 00:13:6B:00:00:00 /24 MA-L 🇯🇵 e-trees Japan, Inc. 00:1B:1A:00:00:00 /24 MA-L