Who owns MAC prefix 0040D8?

0040D8 is registered to OCEAN OFFICE AUTOMATION LTD. in the IEEE MA-L registry.

What devices use 0040D8?

Any network device with a MAC address starting 00:40:D8 was manufactured by or for OCEAN OFFICE AUTOMATION LTD..

MA-L · OUI prefix

OCEAN OFFICE AUTOMATION LTD.

Any MAC address starting 00:40:D8 is registered to OCEAN OFFICE AUTOMATION LTD. in HK.

OUI prefix	0040D8
Vendor	OCEAN OFFICE AUTOMATION LTD.
Registry	MA-L (24-bit, large block)
Country	HK
Example MAC	00:40:D8:00:00:00

What this means

The IEEE assigned the MA-L block 0040D8 to OCEAN OFFICE AUTOMATION 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 00:40:D8, it is OCEAN OFFICE AUTOMATION LTD. hardware.

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