What this means
The IEEE assigned the MA-L block C4CB33 to Garmin International. 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 C4:CB:33, it is Garmin International hardware.
Frequently Asked Questions
Who owns MAC prefix C4CB33?
C4CB33 is registered to Garmin International 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. Garmin International's block covers 16,777,216 addresses.
What devices use C4CB33?
Any network device with a MAC address starting C4:CB:33 was manufactured by or for Garmin International.