What this means
The IEEE assigned the MA-L block 28FC51 to The Electric Controller and Manufacturing Co., LLC. 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 28:FC:51, it is The Electric Controller and Manufacturing Co., LLC hardware.
Frequently Asked Questions
Who owns MAC prefix 28FC51?
28FC51 is registered to The Electric Controller and Manufacturing Co., LLC 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. The Electric Controller and Manufacturing Co., LLC's block covers 16,777,216 addresses.
What devices use 28FC51?
Any network device with a MAC address starting 28:FC:51 was manufactured by or for The Electric Controller and Manufacturing Co., LLC.