What this means
The IEEE assigned the MA-M block DC4427D to Rohde&Schwarz Topex SA. 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 DC:44:27:D, it is Rohde&Schwarz Topex SA hardware.
Frequently Asked Questions
Who owns MAC prefix DC4427D?
DC4427D is registered to Rohde&Schwarz Topex SA 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. Rohde&Schwarz Topex SA's block covers 1,048,576 addresses.
What devices use DC4427D?
Any network device with a MAC address starting DC:44:27:D was manufactured by or for Rohde&Schwarz Topex SA.