What this means
The IEEE assigned the MA-L block 0021A5 to ERLPhase Power Technologies Ltd.. 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 00:21:A5, it is ERLPhase Power Technologies Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 0021A5?
0021A5 is registered to ERLPhase Power Technologies Ltd. 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. ERLPhase Power Technologies Ltd.'s block covers 16,777,216 addresses.
What devices use 0021A5?
Any network device with a MAC address starting 00:21:A5 was manufactured by or for ERLPhase Power Technologies Ltd..