Who owns MAC prefix 2057AF?

2057AF is registered to Shenzhen FH-NET OPTOELECTRONICS CO.,LTD in the IEEE MA-L registry.

What devices use 2057AF?

Any network device with a MAC address starting 20:57:AF was manufactured by or for Shenzhen FH-NET OPTOELECTRONICS CO.,LTD.

MA-L · OUI prefix

Shenzhen FH-NET OPTOELECTRONICS CO.,LTD

Any MAC address starting 20:57:AF is registered to Shenzhen FH-NET OPTOELECTRONICS CO.,LTD in CN.

OUI prefix	2057AF
Vendor	Shenzhen FH-NET OPTOELECTRONICS CO.,LTD
Registry	MA-L (24-bit, large block)
Country	CN
Example MAC	20:57:AF:00:00:00

What this means

The IEEE assigned the MA-L block 2057AF to Shenzhen FH-NET OPTOELECTRONICS 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 20:57:AF, it is Shenzhen FH-NET OPTOELECTRONICS CO.,LTD hardware.

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