What this means
The IEEE assigned the MA-L block CC5B31 to Nintendo 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 CC:5B:31, it is Nintendo Co.,Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix CC5B31?
CC5B31 is registered to Nintendo 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. Nintendo Co.,Ltd's block covers 16,777,216 addresses.
What devices use CC5B31?
Any network device with a MAC address starting CC:5B:31 was manufactured by or for Nintendo Co.,Ltd.