What this means
The IEEE assigned the MA-L block B04F3C to Genuine Optics. 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 B0:4F:3C, it is Genuine Optics hardware.
Frequently Asked Questions
Who owns MAC prefix B04F3C?
B04F3C is registered to Genuine Optics 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. Genuine Optics's block covers 16,777,216 addresses.
What devices use B04F3C?
Any network device with a MAC address starting B0:4F:3C was manufactured by or for Genuine Optics.