What this means
The IEEE assigned the MA-L block E4A387 to Control Solutions 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 E4:A3:87, it is Control Solutions LLC hardware.
Frequently Asked Questions
Who owns MAC prefix E4A387?
E4A387 is registered to Control Solutions 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. Control Solutions LLC's block covers 16,777,216 addresses.
What devices use E4A387?
Any network device with a MAC address starting E4:A3:87 was manufactured by or for Control Solutions LLC.