What this means
The IEEE assigned the MA-M block D42000D to ZUUM. 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 D4:20:00:D, it is ZUUM hardware.
Frequently Asked Questions
Who owns MAC prefix D42000D?
D42000D is registered to ZUUM 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. ZUUM's block covers 1,048,576 addresses.
What devices use D42000D?
Any network device with a MAC address starting D4:20:00:D was manufactured by or for ZUUM.