What this means
The IEEE assigned the MA-L block F0007F to Janz - Contadores de Energia, SA. 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 F0:00:7F, it is Janz - Contadores de Energia, SA hardware.
Frequently Asked Questions
Who owns MAC prefix F0007F?
F0007F is registered to Janz - Contadores de Energia, SA 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. Janz - Contadores de Energia, SA's block covers 16,777,216 addresses.
What devices use F0007F?
Any network device with a MAC address starting F0:00:7F was manufactured by or for Janz - Contadores de Energia, SA.