58,507 registered blocks.

🇨🇭 Open Infrastructure 90:27:78:00:00:00 /24 MA-L 🇺🇸 Open Interface North America 00:14:BB:00:00:00 /24 MA-L 🇷🇺 open joint stock company "YUG-SISTEMA plus" 74:E1:4A:40:00:00 /28 MA-M 🇺🇸 Open Mesh, Inc. AC:86:74:00:00:00 /24 MA-L 🇺🇸 Open Mesh, Inc. F8:D9:B8:00:00:00 /24 MA-L 🇯🇵 Open Network Co., Ltd. 00:02:91:00:00:00 /24 MA-L 🇺🇸 Open Networking Laboratory A4:23:05:00:00:00 /24 MA-L 🇦🇺 OPEN Networks Pty Ltd 00:01:27:00:00:00 /24 MA-L 🇹🇼 OPEN ROAD SOLUTIONS , INC. 24:94:42:00:00:00 /24 MA-L 🇺🇸 Open Source Robotics Foundation, Inc. A4:F3:C1:00:00:00 /24 MA-L 🇰🇷 Open Stack, Inc. 50:F0:03:00:00:00 /24 MA-L 🇺🇸 Open Standard Digital-IF Interface for SATCOM Systems E0:DB:88:00:00:00 /24 MA-L 🇬🇧 Open System Solutions Limited 00:50:C2:81:10:00 /36 IAB 🇬🇧 Open System Solutions Limited 70:B3:D5:44:B0:00 /36 MA-S 🇬🇧 Open System Solutions Limited 70:B3:D5:FA:B0:00 /36 MA-S 🇺🇸 Open Systems International 00:11:B6:00:00:00 /24 MA-L 🇰🇷 Open Telecom 00:0E:92:00:00:00 /24 MA-L 🇺🇸 Open Video, Inc. 00:50:C2:80:B0:00 /36 IAB 🇨🇳 Open-m technology limited 58:1F:67:00:00:00 /24 MA-L 🇺🇸 OpenAI 8C:20:F1:00:00:00 /24 MA-L 🇰🇷 OPENBRAIN TECHNOLOGIES CO., LTD. 00:15:0E:00:00:00 /24 MA-L 🇺🇸 OpenCon Systems, Inc. 00:50:A8:00:00:00 /24 MA-L 🇨🇳 Openet information technology(shenzhen) Co., Ltd. 00:0C:2E:00:00:00 /24 MA-L 🇺🇸 Openeye 4C:91:7A:60:00:00 /28 MA-M 🇺🇸 Openeye C4:FF:84:A0:00:00 /28 MA-M 🇺🇸 OpenGear, Inc 00:13:C6:00:00:00 /24 MA-L 🇺🇸 OpenIB, Inc. 00:14:05:00:00:00 /24 MA-L 🇨🇿 Openmatics s.r.o. 7C:97:63:00:00:00 /24 MA-L 🇹🇼 OPENMOKO, INC. 00:1F:11:00:00:00 /24 MA-L 🇭🇺 OpenPark Technologies Kft 8C:1F:64:74:E0:00 /36 MA-S 🇫🇷 OpenPattern 64:DB:18:00:00:00 /24 MA-L 🇺🇸 Openpeak, Inc 80:C8:62:00:00:00 /24 MA-L 🇺🇸 Openpeak, Inc 00:1B:C5:02:10:00 /36 MA-S 🇺🇸 OpenPeak, Inc. 00:50:C2:4A:D0:00 /36 IAB 🇩🇪 OpenPKG GmbH 00:50:C2:65:80:00 /36 IAB 🇸🇪 OpenProducts 237 AB 1C:63:B7:00:00:00 /24 MA-L 🇱🇻 OpenRB.com, Direct SIA 00:1B:C5:00:10:00 /36 MA-S 🇳🇱 OpenRTLS Group 04:6E:02:00:00:00 /24 MA-L 🇰🇷 Opentech Inc. 00:05:8C:00:00:00 /24 MA-L 🇺🇸 Opentext 78:F7:A3:00:00:00 /24 MA-L 🇨🇳 OpenVox Communication Co Ltd A0:98:05:00:00:00 /24 MA-L 🇺🇸 OpenWrt 20:05:B6:00:00:00 /24 MA-L 🇳🇱 OpenXS B.V. 00:50:C2:AC:20:00 /36 IAB 🇳🇱 OpenXS BV 08:FC:52:00:00:00 /24 MA-L 🇷🇺 OpenYard LLC 08:F8:0D:80:00:00 /28 MA-M 🇦🇺 Operational Technology Solutions 70:B3:D5:4D:60:00 /36 MA-S 🇺🇸 OPEX CORPORATION 04:C9:8B:70:00:00 /28 MA-M 🇮🇱 Opgal Optronic Industries 70:B3:D5:2A:D0:00 /36 MA-S 🇮🇱 Opgal Optronic Industries ltd 8C:1F:64:35:C0:00 /36 MA-S 🇸🇬 Ophir Manufacturing Solutions Pte Ltd 8C:1F:64:29:50:00 /36 MA-S 🇸🇬 Ophir Manufacturing Solutions Pte Ltd 8C:1F:64:CA:E0:00 /36 MA-S 🇸🇬 Ophir Manufacturing Solutions Pte Ltd 8C:1F:64:F6:D0:00 /36 MA-S 🇮🇱 Ophir Optronics Ltd 00:1E:AF:00:00:00 /24 MA-L 🇺🇸 Ophir-Spiricon LLC 00:07:31:00:00:00 /24 MA-L 🇰🇷 Ophit Co.Ltd. 00:09:33:00:00:00 /24 MA-L 🇫🇷 Ophrys Systèmes F8:1D:78:90:00:00 /28 MA-M 🇰🇷 OPICOM 00:30:29:00:00:00 /24 MA-L 🇺🇸 Oplink Communications 00:50:C2:36:D0:00 /36 IAB 🇨🇳 OPMEX Tech. E8:EF:89:00:00:00 /24 MA-L 🇹🇼 OPNET Technologies CO., LTD. 00:0A:BE:00:00:00 /24 MA-L 🇳🇱 OPNT BV 7C:BC:84:A0:00:00 /28 MA-M 🇩🇪 Oppermann Regelgeräte GmbH 00:6A:5E:E0:00:00 /28 MA-M 🇨🇳 OPPLE LIGHTING CO., LTD F8:97:25:00:00:00 /24 MA-L 🇺🇸 OPPO Digital, Inc. 00:22:DE:00:00:00 /24 MA-L 🇨🇦 Opsens Solution Inc. A0:41:5E:00:00:00 /24 MA-L 🇺🇸 Opsys Tech Inc CC:82:7B:70:00:00 /28 MA-M 🇮🇱 Opsys-Tech 70:B3:D5:99:D0:00 /36 MA-S 🇨🇳 OPT Machine Vision Tech Co., Ltd 00:02:C4:00:00:00 /24 MA-L 🇯🇵 Optcom Co., Ltd. C8:6C:B6:00:00:00 /24 MA-L 🇺🇸 OptConnect 0C:CC:47:90:00:00 /28 MA-M 🇯🇵 OPTEC DAIICHI DENKO CO., LTD. 00:40:39:00:00:00 /24 MA-L 🇺🇸 Optec Displays, Inc. 00:24:79:00:00:00 /24 MA-L 🇨🇳 Optek Digital Technology company limited 94:9F:3F:00:00:00 /24 MA-L 🇺🇸 Opteon Corporation 00:07:A2:00:00:00 /24 MA-L 🇯🇵 OPTEX CO.,LTD. 00:1F:D1:00:00:00 /24 MA-L 🇯🇵 OPTEX-FA CO.,LTD. FC:F1:CD:00:00:00 /24 MA-L 🇺🇸 Opthos Inc. 00:06:3E:00:00:00 /24 MA-L 🇺🇸 OPTI, INC. 00:30:07:00:00:00 /24 MA-L 🇺🇸 Opti-cell, Inc. 00:0D:95:00:00:00 /24 MA-L 🇺🇸 Opti-Sciences, Inc. 70:B3:D5:33:80:00 /36 MA-S 🇮🇱 OPTIBASE LTD 00:1A:05:00:00:00 /24 MA-L 🇮🇱 Optibase Ltd. 00:50:C2:14:C0:00 /36 IAB 🇺🇸 Optica Technologies Inc. 00:16:0E:00:00:00 /24 MA-L 🇮🇱 Optical Access 00:04:90:00:00:00 /24 MA-L 🇺🇸 OPTICAL ACCESS INTERNATIONAL 00:E0:65:00:00:00 /24 MA-L 🇺🇸 Optical Air Data Systems 00:50:C2:39:A0:00 /36 IAB 🇺🇸 Optical Communications Products Inc. 00:0A:1D:00:00:00 /24 MA-L 🇺🇸 Optical Internetworking Forum 00:0F:40:00:00:00 /24 MA-L 🇺🇸 Optical Network Testing, Inc. 00:06:E8:00:00:00 /24 MA-L 🇨🇳 OPTICAL NETWORK VIDEO TECHNOLOGIES (SHENZHEN) CO., LTD. 20:77:59:00:00:00 /24 MA-L 🇺🇸 OPTICAL NETWORKS, INC. 00:30:1F:00:00:00 /24 MA-L 🇦🇺 Optical Systems Design 00:26:DC:00:00:00 /24 MA-L 🇺🇸 Optical Wireless Link Inc. 00:50:C2:18:50:00 /36 IAB 🇺🇸 Optical Zonu Corporation 00:08:EC:00:00:00 /24 MA-L 🇺🇸 Opticom Communication, LLC 44:C4:A9:00:00:00 /24 MA-L 🇺🇸 Opticom Communications, LLC 00:17:D0:00:00:00 /24 MA-L 🇺🇸 Opticomm Corporation 00:1C:95:00:00:00 /24 MA-L 🇳🇱 Opticon Sensors Europe B.V. 38:89:DC:00:00:00 /24 MA-L 🇰🇷 OptiCore Inc. 04:FA:3F:00:00:00 /24 MA-L 🇨🇳 Optictimes Co.,Ltd 94:02:6B:00:00:00 /24 MA-L