What this means
The IEEE assigned the MA-L block F03F03 to Private. 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 F0:3F:03, it is Private hardware.
Frequently Asked Questions
Who owns MAC prefix F03F03?
F03F03 is registered to Private 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. Private's block covers 16,777,216 addresses.
What devices use F03F03?
Any network device with a MAC address starting F0:3F:03 was manufactured by or for Private.