What this means
The IEEE assigned the MA-L block 28F532 to ADD-Engineering BV. 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 28:F5:32, it is ADD-Engineering BV hardware.
Frequently Asked Questions
Who owns MAC prefix 28F532?
28F532 is registered to ADD-Engineering BV 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. ADD-Engineering BV's block covers 16,777,216 addresses.
What devices use 28F532?
Any network device with a MAC address starting 28:F5:32 was manufactured by or for ADD-Engineering BV.