What this means
The IEEE assigned the MA-L block 080581 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 08:05:81, it is Roku, Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix 080581?
080581 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 080581?
Any network device with a MAC address starting 08:05:81 was manufactured by or for Roku, Inc..