What this means
The IEEE assigned the MA-L block 004056 to MCM JAPAN 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 00:40:56, it is MCM JAPAN LTD. hardware.
Frequently Asked Questions
Who owns MAC prefix 004056?
004056 is registered to MCM JAPAN 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. MCM JAPAN LTD.'s block covers 16,777,216 addresses.
What devices use 004056?
Any network device with a MAC address starting 00:40:56 was manufactured by or for MCM JAPAN LTD..