What this means
The IEEE assigned the MA-L block 4CFBF4 to Optimal Audio Ltd. 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 4C:FB:F4, it is Optimal Audio Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 4CFBF4?
4CFBF4 is registered to Optimal Audio Ltd 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. Optimal Audio Ltd's block covers 16,777,216 addresses.
What devices use 4CFBF4?
Any network device with a MAC address starting 4C:FB:F4 was manufactured by or for Optimal Audio Ltd.