Who owns MAC prefix 40ED983?

40ED983 is registered to Knox Company in the IEEE MA-M registry.

What devices use 40ED983?

Any network device with a MAC address starting 40:ED:98:3 was manufactured by or for Knox Company.

MA-M · OUI prefix

Knox Company

Any MAC address starting 40:ED:98:3 is registered to Knox Company in US.

OUI prefix	40ED983
Vendor	Knox Company
Registry	MA-M (28-bit, medium block)
Country	US
Example MAC	40:ED:98:3:00:00:00

What this means

The IEEE assigned the MA-M block 40ED983 to Knox Company. 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 40:ED:98:3, it is Knox Company hardware.

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