What this means
The IEEE assigned the MA-M block 500B91A to New Audio LLC. 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 50:0B:91:A, it is New Audio LLC hardware.
Frequently Asked Questions
Who owns MAC prefix 500B91A?
500B91A is registered to New Audio LLC 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. New Audio LLC's block covers 1,048,576 addresses.
What devices use 500B91A?
Any network device with a MAC address starting 50:0B:91:A was manufactured by or for New Audio LLC.