What this means
The IEEE assigned the MA-M block 4C4BF94 to Shenzhen dingsheng 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 4C:4B:F9:4, it is Shenzhen dingsheng technology co., LTD hardware.