Devices with MAC addresses that start with 00-21-45 were manufactured by Semptian Technologies Ltd.

Device Manufacturer
Semptian Technologies Ltd.
Manufacturer Location
No. 809, Tower B, Shi Ji Ke Mao
Beijing 100190
Estimated Devices using 00-21-45
16,256,250
Estimated Total Devices From Mfg
16,256,250
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