What this means
The IEEE assigned the MA-L block 64C667 to Barnes&Noble. 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 64:C6:67, it is Barnes&Noble hardware.
Frequently Asked Questions
Who owns MAC prefix 64C667?
64C667 is registered to Barnes&Noble 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. Barnes&Noble's block covers 16,777,216 addresses.
What devices use 64C667?
Any network device with a MAC address starting 64:C6:67 was manufactured by or for Barnes&Noble.