What this means
The IEEE assigned the MA-M block 20B37FA to ShenZhen C&D Electronics 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:B3:7F:A, it is ShenZhen C&D Electronics CO.Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 20B37FA?
20B37FA is registered to ShenZhen C&D Electronics 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. ShenZhen C&D Electronics CO.Ltd.'s block covers 1,048,576 addresses.
What devices use 20B37FA?
Any network device with a MAC address starting 20:B3:7F:A was manufactured by or for ShenZhen C&D Electronics CO.Ltd..