What this means
The IEEE assigned the MA-L block CC1966 to EM Microelectronic. 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 CC:19:66, it is EM Microelectronic hardware.
Frequently Asked Questions
Who owns MAC prefix CC1966?
CC1966 is registered to EM Microelectronic 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. EM Microelectronic's block covers 16,777,216 addresses.
What devices use CC1966?
Any network device with a MAC address starting CC:19:66 was manufactured by or for EM Microelectronic.