What this means
The IEEE assigned the MA-M block C0D391A to Alpha Audiotronics, Inc.. 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:A, it is Alpha Audiotronics, Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix C0D391A?
C0D391A is registered to Alpha Audiotronics, Inc. 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. Alpha Audiotronics, Inc.'s block covers 1,048,576 addresses.
What devices use C0D391A?
Any network device with a MAC address starting C0:D3:91:A was manufactured by or for Alpha Audiotronics, Inc..