What this means
The IEEE assigned the MA-L block 40C81F to Shenzhen Xinguodu 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 40:C8:1F, it is Shenzhen Xinguodu Technology Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 40C81F?
40C81F is registered to Shenzhen Xinguodu 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 Xinguodu Technology Co., Ltd.'s block covers 16,777,216 addresses.
What devices use 40C81F?
Any network device with a MAC address starting 40:C8:1F was manufactured by or for Shenzhen Xinguodu Technology Co., Ltd..