What this means
The IEEE assigned the MA-M block B4DF439 to Epilady 2000. 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 B4:DF:43:9, it is Epilady 2000 hardware.
Frequently Asked Questions
Who owns MAC prefix B4DF439?
B4DF439 is registered to Epilady 2000 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. Epilady 2000's block covers 1,048,576 addresses.
What devices use B4DF439?
Any network device with a MAC address starting B4:DF:43:9 was manufactured by or for Epilady 2000.