What this means
The IEEE assigned the MA-L block 40CA63 to Seongji Industry Company. 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 40:CA:63, it is Seongji Industry Company hardware.
Frequently Asked Questions
Who owns MAC prefix 40CA63?
40CA63 is registered to Seongji Industry Company 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. Seongji Industry Company's block covers 16,777,216 addresses.
What devices use 40CA63?
Any network device with a MAC address starting 40:CA:63 was manufactured by or for Seongji Industry Company.