What this means
The IEEE assigned the MA-L block FC22D3 to FDSYS. 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 FC:22:D3, it is FDSYS hardware.
Frequently Asked Questions
Who owns MAC prefix FC22D3?
FC22D3 is registered to FDSYS 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. FDSYS's block covers 16,777,216 addresses.
What devices use FC22D3?
Any network device with a MAC address starting FC:22:D3 was manufactured by or for FDSYS.