Who owns MAC prefix 543ADF?

543ADF is registered to Qualfiber Technology Co.,Ltd in the IEEE MA-L registry.

What devices use 543ADF?

Any network device with a MAC address starting 54:3A:DF was manufactured by or for Qualfiber Technology Co.,Ltd.

MA-L · OUI prefix

Qualfiber Technology Co.,Ltd

Any MAC address starting 54:3A:DF is registered to Qualfiber Technology Co.,Ltd in CN.

OUI prefix	543ADF
Vendor	Qualfiber Technology Co.,Ltd
Registry	MA-L (24-bit, large block)
Country	CN
Example MAC	54:3A:DF:00:00:00

What this means

The IEEE assigned the MA-L block 543ADF to Qualfiber 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 54:3A:DF, it is Qualfiber Technology Co.,Ltd hardware.

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