Who owns MAC prefix 00165E?

00165E is registered to Precision I/O in the IEEE MA-L registry.

What devices use 00165E?

Any network device with a MAC address starting 00:16:5E was manufactured by or for Precision I/O.

MA-L · OUI prefix

Precision I/O

Any MAC address starting 00:16:5E is registered to Precision I/O in US.

OUI prefix	00165E
Vendor	Precision I/O
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	00:16:5E:00:00:00

What this means

The IEEE assigned the MA-L block 00165E to Precision I/O. 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 00:16:5E, it is Precision I/O hardware.

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