What this means
The IEEE assigned the MA-L block 000DDD to Profilo Telra Elektronik Sanayi ve Ticaret. A.Ş. 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 00:0D:DD, it is Profilo Telra Elektronik Sanayi ve Ticaret. A.Ş hardware.