Who owns MAC prefix 500B91C?

500B91C is registered to Diamond Traffic Products, Inc in the IEEE MA-M registry.

What devices use 500B91C?

Any network device with a MAC address starting 50:0B:91:C was manufactured by or for Diamond Traffic Products, Inc.

MA-M · OUI prefix

Diamond Traffic Products, Inc

Any MAC address starting 50:0B:91:C is registered to Diamond Traffic Products, Inc in US.

OUI prefix	500B91C
Vendor	Diamond Traffic Products, Inc
Registry	MA-M (28-bit, medium block)
Country	US
Example MAC	50:0B:91:C:00:00:00

What this means

The IEEE assigned the MA-M block 500B91C to Diamond Traffic Products, 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 50:0B:91:C, it is Diamond Traffic Products, Inc hardware.

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