Who owns MAC prefix B03B1B?

B03B1B is registered to Kontrolnext Technology (Beijing) Ltd. in the IEEE MA-L registry.

What devices use B03B1B?

Any network device with a MAC address starting B0:3B:1B was manufactured by or for Kontrolnext Technology (Beijing) Ltd..

MA-L · OUI prefix

Kontrolnext Technology (Beijing) Ltd.

Any MAC address starting B0:3B:1B is registered to Kontrolnext Technology (Beijing) Ltd. in CN.

OUI prefix	B03B1B
Vendor	Kontrolnext Technology (Beijing) Ltd.
Registry	MA-L (24-bit, large block)
Country	CN
Example MAC	B0:3B:1B:00:00:00

What this means

The IEEE assigned the MA-L block B03B1B to Kontrolnext Technology (Beijing) 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 B0:3B:1B, it is Kontrolnext Technology (Beijing) Ltd. hardware.

Look up another MAC