What this means
The IEEE assigned the MA-L block D0C42F to Tamagawa Seiki Co.,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 D0:C4:2F, it is Tamagawa Seiki Co.,Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix D0C42F?
D0C42F is registered to Tamagawa Seiki Co.,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. Tamagawa Seiki Co.,Ltd.'s block covers 16,777,216 addresses.
What devices use D0C42F?
Any network device with a MAC address starting D0:C4:2F was manufactured by or for Tamagawa Seiki Co.,Ltd..