What this means
The IEEE assigned the MA-M block C0D391D to REGULUS 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 C0:D3:91:D, it is REGULUS CO.,LTD. hardware.
Frequently Asked Questions
Who owns MAC prefix C0D391D?
C0D391D is registered to REGULUS CO.,LTD. in the IEEE MA-M registry.
What does the MA-M registry type mean?
An MA-M assignment covers 28 bits of the address, giving the vendor 1,048,576 device addresses, a quarter of a full MA-L block. REGULUS CO.,LTD.'s block covers 1,048,576 addresses.
What devices use C0D391D?
Any network device with a MAC address starting C0:D3:91:D was manufactured by or for REGULUS CO.,LTD..