What this means
The IEEE assigned the MA-M block 40A36B5 to National Research Council of Canada. 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 40:A3:6B:5, it is National Research Council of Canada hardware.
Frequently Asked Questions
Who owns MAC prefix 40A36B5?
40A36B5 is registered to National Research Council of Canada in the IEEE MA-M registry.
What does the MA-M registry type mean?
An MA-M assignment covers 28 bits of the address, giving the vendor 1,048,576 device addresses, a quarter of a full MA-L block. National Research Council of Canada's block covers 1,048,576 addresses.
What devices use 40A36B5?
Any network device with a MAC address starting 40:A3:6B:5 was manufactured by or for National Research Council of Canada.