What this means
The IEEE assigned the MA-L block AC9B84 to Smak Tecnologia e Automacao. 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 AC:9B:84, it is Smak Tecnologia e Automacao hardware.
Frequently Asked Questions
Who owns MAC prefix AC9B84?
AC9B84 is registered to Smak Tecnologia e Automacao 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. Smak Tecnologia e Automacao's block covers 16,777,216 addresses.
What devices use AC9B84?
Any network device with a MAC address starting AC:9B:84 was manufactured by or for Smak Tecnologia e Automacao.