What this means
The IEEE assigned the MA-L block 000CB3 to ROUND 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 00:0C:B3, it is ROUND Co.,Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 000CB3?
000CB3 is registered to ROUND 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. ROUND Co.,Ltd.'s block covers 16,777,216 addresses.
What devices use 000CB3?
Any network device with a MAC address starting 00:0C:B3 was manufactured by or for ROUND Co.,Ltd..