What this means
The IEEE assigned the MA-S block 8C1F64511 to Control Aut Tecnologia em Automação LTDA. 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 8C:1F:64:51:1, it is Control Aut Tecnologia em Automação LTDA hardware.
Frequently Asked Questions
Who owns MAC prefix 8C1F64511?
8C1F64511 is registered to Control Aut Tecnologia em Automação LTDA in the IEEE MA-S registry.
What does the MA-S registry type mean?
An MA-S assignment, formerly called OUI-36, covers 36 bits, giving the vendor 4,096 device addresses, the smallest block the IEEE issues. Control Aut Tecnologia em Automação LTDA's block covers 4,096 addresses.
What devices use 8C1F64511?
Any network device with a MAC address starting 8C:1F:64:51:1 was manufactured by or for Control Aut Tecnologia em Automação LTDA.