What this means
The IEEE assigned the MA-M block 8411C21 to Beijing Dayu 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 84:11:C2:1, it is Beijing Dayu Technology Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 8411C21?
8411C21 is registered to Beijing Dayu 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. Beijing Dayu Technology Co., Ltd.'s block covers 1,048,576 addresses.
What devices use 8411C21?
Any network device with a MAC address starting 84:11:C2:1 was manufactured by or for Beijing Dayu Technology Co., Ltd..