What this means
The IEEE assigned the MA-M block B4DF438 to Qizhi Innovation (shenzhen) Conmmunication 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 B4:DF:43:8, it is Qizhi Innovation (shenzhen) Conmmunication Technology Co., Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix B4DF438?
B4DF438 is registered to Qizhi Innovation (shenzhen) Conmmunication Technology Co., Ltd in the IEEE MA-M registry.
What does the MA-M registry type mean?
An MA-M assignment covers 28 bits of the address, giving the vendor 1,048,576 device addresses, a quarter of a full MA-L block. Qizhi Innovation (shenzhen) Conmmunication Technology Co., Ltd's block covers 1,048,576 addresses.
What devices use B4DF438?
Any network device with a MAC address starting B4:DF:43:8 was manufactured by or for Qizhi Innovation (shenzhen) Conmmunication Technology Co., Ltd.