What this means
The IEEE assigned the MA-L block AC3971 to Realme Chongqing Mobile Telecommunications Corp.,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 AC:39:71, it is Realme Chongqing Mobile Telecommunications Corp.,Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix AC3971?
AC3971 is registered to Realme Chongqing Mobile Telecommunications Corp.,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. Realme Chongqing Mobile Telecommunications Corp.,Ltd.'s block covers 16,777,216 addresses.
What devices use AC3971?
Any network device with a MAC address starting AC:39:71 was manufactured by or for Realme Chongqing Mobile Telecommunications Corp.,Ltd..