What this means
The IEEE assigned the MA-L block 28B3AB to Genmark Automation. 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:B3:AB, it is Genmark Automation hardware.
Frequently Asked Questions
Who owns MAC prefix 28B3AB?
28B3AB is registered to Genmark Automation 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. Genmark Automation's block covers 16,777,216 addresses.
What devices use 28B3AB?
Any network device with a MAC address starting 28:B3:AB was manufactured by or for Genmark Automation.