What this means
The IEEE assigned the MA-L block B81BCB to Shanghai Sunmi Technology 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 B8:1B:CB, it is Shanghai Sunmi Technology Co.,Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix B81BCB?
B81BCB is registered to Shanghai Sunmi Technology 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. Shanghai Sunmi Technology Co.,Ltd.'s block covers 16,777,216 addresses.
What devices use B81BCB?
Any network device with a MAC address starting B8:1B:CB was manufactured by or for Shanghai Sunmi Technology Co.,Ltd..