Who owns MAC prefix 24CF21?

24CF21 is registered to Shenzhen State Micro Technology Co., Ltd in the IEEE MA-L registry.

What devices use 24CF21?

Any network device with a MAC address starting 24:CF:21 was manufactured by or for Shenzhen State Micro Technology Co., Ltd.

MA-L · OUI prefix

Shenzhen State Micro Technology Co., Ltd

Any MAC address starting 24:CF:21 is registered to Shenzhen State Micro Technology Co., Ltd in CN.

OUI prefix	24CF21
Vendor	Shenzhen State Micro Technology Co., Ltd
Registry	MA-L (24-bit, large block)
Country	CN
Example MAC	24:CF:21:00:00:00

What this means

The IEEE assigned the MA-L block 24CF21 to Shenzhen State Micro Technology Co., Ltd. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting 24:CF:21, it is Shenzhen State Micro Technology Co., Ltd hardware.

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