What this means
The IEEE assigned the MA-M block 943EFD3 to Bertin GmbH. 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 94:3E:FD:3, it is Bertin GmbH hardware.
Frequently Asked Questions
Who owns MAC prefix 943EFD3?
943EFD3 is registered to Bertin GmbH 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. Bertin GmbH's block covers 1,048,576 addresses.
What devices use 943EFD3?
Any network device with a MAC address starting 94:3E:FD:3 was manufactured by or for Bertin GmbH.