What this means
The IEEE assigned the MA-L block 5003CF to CANON 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 50:03:CF, it is CANON INC. hardware.
Frequently Asked Questions
Who owns MAC prefix 5003CF?
5003CF is registered to CANON 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. CANON INC.'s block covers 16,777,216 addresses.
What devices use 5003CF?
Any network device with a MAC address starting 50:03:CF was manufactured by or for CANON INC..