Who owns MAC prefix 000343?

000343 is registered to Martin Professional A/S in the IEEE MA-L registry.

What devices use 000343?

Any network device with a MAC address starting 00:03:43 was manufactured by or for Martin Professional A/S.

MA-L · OUI prefix

Martin Professional A/S

Any MAC address starting 00:03:43 is registered to Martin Professional A/S in DK.

OUI prefix	000343
Vendor	Martin Professional A/S
Registry	MA-L (24-bit, large block)
Country	DK
Example MAC	00:03:43:00:00:00

What this means

The IEEE assigned the MA-L block 000343 to Martin Professional A/S. 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 00:03:43, it is Martin Professional A/S hardware.

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