Who owns MAC prefix A4D530?

A4D530 is registered to Avaya LLC in the IEEE MA-L registry.

What devices use A4D530?

Any network device with a MAC address starting A4:D5:30 was manufactured by or for Avaya LLC.

MA-L · OUI prefix

Avaya LLC

Any MAC address starting A4:D5:30 is registered to Avaya LLC in US.

OUI prefix	A4D530
Vendor	Avaya LLC
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	A4:D5:30:00:00:00

What this means

The IEEE assigned the MA-L block A4D530 to Avaya 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 A4:D5:30, it is Avaya LLC hardware.

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