What this means
The IEEE assigned the MA-M block 04D16EA to Metra Electronics. 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 04:D1:6E:A, it is Metra Electronics hardware.
Frequently Asked Questions
Who owns MAC prefix 04D16EA?
04D16EA is registered to Metra Electronics 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. Metra Electronics's block covers 1,048,576 addresses.
What devices use 04D16EA?
Any network device with a MAC address starting 04:D1:6E:A was manufactured by or for Metra Electronics.