What this means
The IEEE assigned the MA-L block 00165A to Harman Specialty Group. 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 00:16:5A, it is Harman Specialty Group hardware.
Frequently Asked Questions
Who owns MAC prefix 00165A?
00165A is registered to Harman Specialty Group 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. Harman Specialty Group's block covers 16,777,216 addresses.
What devices use 00165A?
Any network device with a MAC address starting 00:16:5A was manufactured by or for Harman Specialty Group.