What this means
The IEEE assigned the MA-L block C44F33 to Espressif Inc.. 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 C4:4F:33, it is Espressif Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix C44F33?
C44F33 is registered to Espressif Inc. 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. Espressif Inc.'s block covers 16,777,216 addresses.
What devices use C44F33?
Any network device with a MAC address starting C4:4F:33 was manufactured by or for Espressif Inc..