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.

MA-M · OUI prefix

Nanjing yuekong Intelligent Technology

Q: Who owns MAC prefix B437D19?

B437D19 is registered to Nanjing yuekong Intelligent Technology in the IEEE MA-M registry.

Any MAC address starting B4:37:D1:9 is registered to Nanjing yuekong Intelligent Technology in CN.

OUI prefix	B437D19
Vendor	Nanjing yuekong Intelligent Technology
Registry	MA-M (28-bit, medium block)
Country	CN
Example MAC	B4:37:D1:9:00:00:00

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.

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