Who owns MAC prefix 28F5374?

28F5374 is registered to Phyn LLC in the IEEE MA-M registry.

What devices use 28F5374?

Any network device with a MAC address starting 28:F5:37:4 was manufactured by or for Phyn LLC.

MA-M · OUI prefix

Phyn LLC

Any MAC address starting 28:F5:37:4 is registered to Phyn LLC in US.

OUI prefix	28F5374
Vendor	Phyn LLC
Registry	MA-M (28-bit, medium block)
Country	US
Example MAC	28:F5:37:4:00:00:00

What this means

The IEEE assigned the MA-M block 28F5374 to Phyn LLC. 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 28:F5:37:4, it is Phyn LLC hardware.

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