What this means
The IEEE assigned the MA-L block F48139 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 F4:81:39, it is CANON INC. hardware.
Frequently Asked Questions
Who owns MAC prefix F48139?
F48139 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 F48139?
Any network device with a MAC address starting F4:81:39 was manufactured by or for CANON INC..