What this means
The IEEE assigned the MA-L block C4EEF5 to II-VI Incorporated. 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:EE:F5, it is II-VI Incorporated hardware.
Frequently Asked Questions
Who owns MAC prefix C4EEF5?
C4EEF5 is registered to II-VI Incorporated 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. II-VI Incorporated's block covers 16,777,216 addresses.
What devices use C4EEF5?
Any network device with a MAC address starting C4:EE:F5 was manufactured by or for II-VI Incorporated.