What this means
The IEEE assigned the MA-L block A8F8C9 to NXP Semiconductor (Tianjin) 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 A8:F8:C9, it is NXP Semiconductor (Tianjin) LTD. hardware.