What this means
The IEEE assigned the MA-M block A4DA22A to Grundig. 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 A4:DA:22:A, it is Grundig hardware.
Frequently Asked Questions
Who owns MAC prefix A4DA22A?
A4DA22A is registered to Grundig 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. Grundig's block covers 1,048,576 addresses.
What devices use A4DA22A?
Any network device with a MAC address starting A4:DA:22:A was manufactured by or for Grundig.