What this means
The IEEE assigned the MA-L block F4FCB1 to JJ Corp. 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 F4:FC:B1, it is JJ Corp hardware.
Frequently Asked Questions
Who owns MAC prefix F4FCB1?
F4FCB1 is registered to JJ Corp 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. JJ Corp's block covers 16,777,216 addresses.
What devices use F4FCB1?
Any network device with a MAC address starting F4:FC:B1 was manufactured by or for JJ Corp.