What this means
The IEEE assigned the MA-L block FCF1CD to OPTEX-FA CO.,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 FC:F1:CD, it is OPTEX-FA CO.,LTD. hardware.
Frequently Asked Questions
Who owns MAC prefix FCF1CD?
FCF1CD is registered to OPTEX-FA CO.,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. OPTEX-FA CO.,LTD.'s block covers 16,777,216 addresses.
What devices use FCF1CD?
Any network device with a MAC address starting FC:F1:CD was manufactured by or for OPTEX-FA CO.,LTD..