Who owns MAC prefix 5491AF0?

5491AF0 is registered to Opal-RT Technologies Inc. in the IEEE MA-M registry.

What devices use 5491AF0?

Any network device with a MAC address starting 54:91:AF:0 was manufactured by or for Opal-RT Technologies Inc..

MA-M · OUI prefix

Opal-RT Technologies Inc.

Any MAC address starting 54:91:AF:0 is registered to Opal-RT Technologies Inc..

OUI prefix	5491AF0
Vendor	Opal-RT Technologies Inc.
Registry	MA-M (28-bit, medium block)
Example MAC	54:91:AF:0:00:00:00

What this means

The IEEE assigned the MA-M block 5491AF0 to Opal-RT Technologies Inc.. 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 54:91:AF:0, it is Opal-RT Technologies Inc. hardware.

Look up another MAC