Devices with MAC addresses that start with 00-21-BB were manufactured by Riken Keiki Co., Ltd.

Device Manufacturer
Riken Keiki Co., Ltd.
Manufacturer Location
2-7-6 Azusawa
Itabashi-Ku Tokyo 174-8744
Estimated Devices using 00-21-BB
16,256,250
Estimated Total Devices From Mfg
16,256,250
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