What this means
The IEEE assigned the MA-L block DC3A5E 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 DC:3A:5E, it is Roku, Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix DC3A5E?
DC3A5E 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 DC3A5E?
Any network device with a MAC address starting DC:3A:5E was manufactured by or for Roku, Inc..