What this means
The IEEE assigned the MA-L block 00CF1C 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 00:CF:1C, it is Communication Machinery Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix 00CF1C?
00CF1C 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 00CF1C?
Any network device with a MAC address starting 00:CF:1C was manufactured by or for Communication Machinery Corporation.