What this means
The IEEE assigned the MA-L block 28827C to Bosch Automative products(Suzhou)Co.,Ltd Changzhou Branch. 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 28:82:7C, it is Bosch Automative products(Suzhou)Co.,Ltd Changzhou Branch hardware.