What this means
The IEEE assigned the MA-L block 0022D5 to Eaton Corp. Electrical Group Data Center Solutions - Pulizzi. 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 00:22:D5, it is Eaton Corp. Electrical Group Data Center Solutions - Pulizzi hardware.