What this means
The IEEE assigned the MA-L block B83E59 to Roku, 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 B8:3E:59, it is Roku, Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix B83E59?
B83E59 is registered to Roku, 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. Roku, Inc.'s block covers 16,777,216 addresses.
What devices use B83E59?
Any network device with a MAC address starting B8:3E:59 was manufactured by or for Roku, Inc..