Who owns MAC prefix 001FD1?

001FD1 is registered to OPTEX CO.,LTD. in the IEEE MA-L registry.

What devices use 001FD1?

Any network device with a MAC address starting 00:1F:D1 was manufactured by or for OPTEX CO.,LTD..

MA-L · OUI prefix

OPTEX CO.,LTD.

Any MAC address starting 00:1F:D1 is registered to OPTEX CO.,LTD. in JP.

OUI prefix	001FD1
Vendor	OPTEX CO.,LTD.
Registry	MA-L (24-bit, large block)
Country	JP
Example MAC	00:1F:D1:00:00:00

What this means

The IEEE assigned the MA-L block 001FD1 to OPTEX CO.,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 00:1F:D1, it is OPTEX CO.,LTD. hardware.

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