What this means
The IEEE assigned the MA-M block 3CFAD3D to AMobile Solutions (Xiamen) 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 3C:FA:D3:D, it is AMobile Solutions (Xiamen) CO. , LTD. hardware.