What this means

The IEEE assigned the MA-M block 4C4BF90 to Multitek Elektronik Sanayi ve Ticaret A.S.. 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:F9:0, it is Multitek Elektronik Sanayi ve Ticaret A.S. hardware.