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.
Frequently Asked Questions
Who owns MAC prefix 0040D8?
0040D8 is registered to OCEAN OFFICE AUTOMATION LTD. in the IEEE MA-L registry.
What does the MA-L registry type mean?
An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. OCEAN OFFICE AUTOMATION LTD.'s block covers 16,777,216 addresses.
What devices use 0040D8?
Any network device with a MAC address starting 00:40:D8 was manufactured by or for OCEAN OFFICE AUTOMATION LTD..