What this means
The IEEE assigned the MA-L block 000CFB to Korea Network Systems. 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 00:0C:FB, it is Korea Network Systems hardware.
Frequently Asked Questions
Who owns MAC prefix 000CFB?
000CFB is registered to Korea Network Systems 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. Korea Network Systems's block covers 16,777,216 addresses.
What devices use 000CFB?
Any network device with a MAC address starting 00:0C:FB was manufactured by or for Korea Network Systems.