Who owns MAC prefix 50FF997?

50FF997 is registered to Honeywell International in the IEEE MA-M registry.

What devices use 50FF997?

Any network device with a MAC address starting 50:FF:99:7 was manufactured by or for Honeywell International.

MA-M · OUI prefix

Honeywell International

Any MAC address starting 50:FF:99:7 is registered to Honeywell International in US.

OUI prefix	50FF997
Vendor	Honeywell International
Registry	MA-M (28-bit, medium block)
Country	US
Example MAC	50:FF:99:7:00:00:00

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.

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