Who owns MAC prefix 40D559?

40D559 is registered to MICRO S.E.R.I. in the IEEE MA-L registry.

What devices use 40D559?

Any network device with a MAC address starting 40:D5:59 was manufactured by or for MICRO S.E.R.I..

MA-L · OUI prefix

MICRO S.E.R.I.

Any MAC address starting 40:D5:59 is registered to MICRO S.E.R.I. in FR.

OUI prefix	40D559
Vendor	MICRO S.E.R.I.
Registry	MA-L (24-bit, large block)
Country	FR
Example MAC	40:D5:59:00:00:00

What this means

The IEEE assigned the MA-L block 40D559 to MICRO S.E.R.I.. 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 40:D5:59, it is MICRO S.E.R.I. hardware.

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