What this means
The IEEE assigned the MA-M block 50FF997 to Honeywell International. 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 50:FF:99:7, it is Honeywell International hardware.
Frequently Asked Questions
Who owns MAC prefix 50FF997?
50FF997 is registered to Honeywell International 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. Honeywell International's block covers 1,048,576 addresses.
What devices use 50FF997?
Any network device with a MAC address starting 50:FF:99:7 was manufactured by or for Honeywell International.