Who owns MAC prefix 0021A5?

0021A5 is registered to ERLPhase Power Technologies Ltd. in the IEEE MA-L registry.

What devices use 0021A5?

Any network device with a MAC address starting 00:21:A5 was manufactured by or for ERLPhase Power Technologies Ltd..

MA-L · OUI prefix

ERLPhase Power Technologies Ltd.

Any MAC address starting 00:21:A5 is registered to ERLPhase Power Technologies Ltd..

OUI prefix	0021A5
Vendor	ERLPhase Power Technologies Ltd.
Registry	MA-L (24-bit, large block)
Example MAC	00:21:A5:00:00:00

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.

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