What this means
The IEEE assigned the MA-L block 20F41B to SHENZHEN BILIAN ELECTRONIC 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 20:F4:1B, it is SHENZHEN BILIAN ELECTRONIC CO.，LTD hardware.
Frequently Asked Questions
Who owns MAC prefix 20F41B?
20F41B is registered to SHENZHEN BILIAN ELECTRONIC CO.，LTD in the IEEE MA-L registry.
What does the MA-L registry type mean?
An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. SHENZHEN BILIAN ELECTRONIC CO.，LTD's block covers 16,777,216 addresses.
What devices use 20F41B?
Any network device with a MAC address starting 20:F4:1B was manufactured by or for SHENZHEN BILIAN ELECTRONIC CO.，LTD.