What this means
The IEEE assigned the MA-M block B4DF430 to Metatronix srl. 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:43:0, it is Metatronix srl hardware.
Frequently Asked Questions
Who owns MAC prefix B4DF430?
B4DF430 is registered to Metatronix srl 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. Metatronix srl's block covers 1,048,576 addresses.
What devices use B4DF430?
Any network device with a MAC address starting B4:DF:43:0 was manufactured by or for Metatronix srl.