What this means
The IEEE assigned the MA-L block 02CF1C to Communication Machinery Corporation. 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 02:CF:1C, it is Communication Machinery Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix 02CF1C?
02CF1C is registered to Communication Machinery Corporation 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. Communication Machinery Corporation's block covers 16,777,216 addresses.
What devices use 02CF1C?
Any network device with a MAC address starting 02:CF:1C was manufactured by or for Communication Machinery Corporation.