What this means
The IEEE assigned the MA-L block 00405C to FUTURE SYSTEMS, INC.. 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 00:40:5C, it is FUTURE SYSTEMS, INC. hardware.
Frequently Asked Questions
Who owns MAC prefix 00405C?
00405C is registered to FUTURE SYSTEMS, INC. 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. FUTURE SYSTEMS, INC.'s block covers 16,777,216 addresses.
What devices use 00405C?
Any network device with a MAC address starting 00:40:5C was manufactured by or for FUTURE SYSTEMS, INC..