What this means
The IEEE assigned the MA-L block 00054B to Eaton Automation AG. 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 00:05:4B, it is Eaton Automation AG hardware.
Frequently Asked Questions
Who owns MAC prefix 00054B?
00054B is registered to Eaton Automation AG in the IEEE MA-L registry.
What does the MA-L registry type mean?
An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. Eaton Automation AG's block covers 16,777,216 addresses.
What devices use 00054B?
Any network device with a MAC address starting 00:05:4B was manufactured by or for Eaton Automation AG.