What this means
The IEEE assigned the MA-L block C40BCB to Xiaomi Communications Co Ltd. 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 C4:0B:CB, it is Xiaomi Communications Co Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix C40BCB?
C40BCB is registered to Xiaomi Communications Co Ltd 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. Xiaomi Communications Co Ltd's block covers 16,777,216 addresses.
What devices use C40BCB?
Any network device with a MAC address starting C4:0B:CB was manufactured by or for Xiaomi Communications Co Ltd.