Who owns MAC prefix A4D1D1?

A4D1D1 is registered to ECOtality North America in the IEEE MA-L registry.

What devices use A4D1D1?

Any network device with a MAC address starting A4:D1:D1 was manufactured by or for ECOtality North America.

MA-L · OUI prefix

ECOtality North America

Any MAC address starting A4:D1:D1 is registered to ECOtality North America in US.

OUI prefix	A4D1D1
Vendor	ECOtality North America
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	A4:D1:D1:00:00:00

What this means

The IEEE assigned the MA-L block A4D1D1 to ECOtality North America. 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:D1:D1, it is ECOtality North America hardware.

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