What this means
The IEEE assigned the MA-M block 50FF993 to Yongjing Shanghai Electronic Science and 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 50:FF:99:3, it is Yongjing Shanghai Electronic Science and Technology hardware.
Frequently Asked Questions
Who owns MAC prefix 50FF993?
50FF993 is registered to Yongjing Shanghai Electronic Science and 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. Yongjing Shanghai Electronic Science and Technology's block covers 1,048,576 addresses.
What devices use 50FF993?
Any network device with a MAC address starting 50:FF:99:3 was manufactured by or for Yongjing Shanghai Electronic Science and Technology.