What this means
The IEEE assigned the MA-L block 505B1D to Shenzhen C-Data Technology 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 50:5B:1D, it is Shenzhen C-Data Technology Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 505B1D?
505B1D is registered to Shenzhen C-Data Technology 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 C-Data Technology Co., Ltd.'s block covers 16,777,216 addresses.
What devices use 505B1D?
Any network device with a MAC address starting 50:5B:1D was manufactured by or for Shenzhen C-Data Technology Co., Ltd..