What this means
The IEEE assigned the MA-L block 64A7DD to Avaya Inc. 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 64:A7:DD, it is Avaya Inc hardware.
Frequently Asked Questions
Who owns MAC prefix 64A7DD?
64A7DD is registered to Avaya Inc in the IEEE MA-L registry.
What does the MA-L registry type mean?
An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. Avaya Inc's block covers 16,777,216 addresses.
What devices use 64A7DD?
Any network device with a MAC address starting 64:A7:DD was manufactured by or for Avaya Inc.