Who owns MAC prefix A445CD?

A445CD is registered to IoT Diagnostics in the IEEE MA-L registry.

What devices use A445CD?

Any network device with a MAC address starting A4:45:CD was manufactured by or for IoT Diagnostics.

MA-L · OUI prefix

IoT Diagnostics

Any MAC address starting A4:45:CD is registered to IoT Diagnostics in US.

OUI prefix	A445CD
Vendor	IoT Diagnostics
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	A4:45:CD:00:00:00

What this means

The IEEE assigned the MA-L block A445CD to IoT Diagnostics. 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 A4:45:CD, it is IoT Diagnostics hardware.

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