What this means
The IEEE assigned the MA-M block 943EFD0 to Brooks Instrument. 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:0, it is Brooks Instrument hardware.
Frequently Asked Questions
Who owns MAC prefix 943EFD0?
943EFD0 is registered to Brooks Instrument 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. Brooks Instrument's block covers 1,048,576 addresses.
What devices use 943EFD0?
Any network device with a MAC address starting 94:3E:FD:0 was manufactured by or for Brooks Instrument.