What this means
The IEEE assigned the MA-L block 00C04C to DEPARTMENT OF FOREIGN AFFAIRS. 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:C0:4C, it is DEPARTMENT OF FOREIGN AFFAIRS hardware.
Frequently Asked Questions
Who owns MAC prefix 00C04C?
00C04C is registered to DEPARTMENT OF FOREIGN AFFAIRS 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. DEPARTMENT OF FOREIGN AFFAIRS's block covers 16,777,216 addresses.
What devices use 00C04C?
Any network device with a MAC address starting 00:C0:4C was manufactured by or for DEPARTMENT OF FOREIGN AFFAIRS.