What this means
The IEEE assigned the MA-L block B4C170 to Yi chip Microelectronics (Hangzhou) 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 B4:C1:70, it is Yi chip Microelectronics (Hangzhou) Co., Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix B4C170?
B4C170 is registered to Yi chip Microelectronics (Hangzhou) 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. Yi chip Microelectronics (Hangzhou) Co., Ltd's block covers 16,777,216 addresses.
What devices use B4C170?
Any network device with a MAC address starting B4:C1:70 was manufactured by or for Yi chip Microelectronics (Hangzhou) Co., Ltd.