What this means
The IEEE assigned the MA-M block B437D19 to Nanjing yuekong Intelligent Technology. 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 B4:37:D1:9, it is Nanjing yuekong Intelligent Technology hardware.
Frequently Asked Questions
Who owns MAC prefix B437D19?
B437D19 is registered to Nanjing yuekong Intelligent Technology 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. Nanjing yuekong Intelligent Technology's block covers 1,048,576 addresses.
What devices use B437D19?
Any network device with a MAC address starting B4:37:D1:9 was manufactured by or for Nanjing yuekong Intelligent Technology.