What this means
The IEEE assigned the MA-M block AC1DDF3 to CRDE. 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 AC:1D:DF:3, it is CRDE hardware.
Frequently Asked Questions
Who owns MAC prefix AC1DDF3?
AC1DDF3 is registered to CRDE 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. CRDE's block covers 1,048,576 addresses.
What devices use AC1DDF3?
Any network device with a MAC address starting AC:1D:DF:3 was manufactured by or for CRDE.