What this means
The IEEE assigned the MA-L block C4F57C to Brocade Communications Systems LLC. 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 C4:F5:7C, it is Brocade Communications Systems LLC hardware.
Frequently Asked Questions
Who owns MAC prefix C4F57C?
C4F57C is registered to Brocade Communications Systems LLC 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. Brocade Communications Systems LLC's block covers 16,777,216 addresses.
What devices use C4F57C?
Any network device with a MAC address starting C4:F5:7C was manufactured by or for Brocade Communications Systems LLC.