Who owns MAC prefix C81B5C?

C81B5C is registered to BCTech in the IEEE MA-L registry.

What devices use C81B5C?

Any network device with a MAC address starting C8:1B:5C was manufactured by or for BCTech.

MA-L · OUI prefix

BCTech

Any MAC address starting C8:1B:5C is registered to BCTech in CN.

OUI prefix	C81B5C
Vendor	BCTech
Registry	MA-L (24-bit, large block)
Country	CN
Example MAC	C8:1B:5C:00:00:00

What this means

The IEEE assigned the MA-L block C81B5C to BCTech. 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 C8:1B:5C, it is BCTech hardware.

Look up another MAC