What this means
The IEEE assigned the MA-L block FC7F56 to CoSyst Control Systems GmbH. 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:7F:56, it is CoSyst Control Systems GmbH hardware.
Frequently Asked Questions
Who owns MAC prefix FC7F56?
FC7F56 is registered to CoSyst Control Systems GmbH 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. CoSyst Control Systems GmbH's block covers 16,777,216 addresses.
What devices use FC7F56?
Any network device with a MAC address starting FC:7F:56 was manufactured by or for CoSyst Control Systems GmbH.