What this means
The IEEE assigned the MA-L block 0040EA to PLAIN TREE SYSTEMS INC. 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 00:40:EA, it is PLAIN TREE SYSTEMS INC hardware.
Frequently Asked Questions
Who owns MAC prefix 0040EA?
0040EA is registered to PLAIN TREE SYSTEMS INC 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. PLAIN TREE SYSTEMS INC's block covers 16,777,216 addresses.
What devices use 0040EA?
Any network device with a MAC address starting 00:40:EA was manufactured by or for PLAIN TREE SYSTEMS INC.