What this means
The IEEE assigned the MA-L block A4CF03 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 A4:CF:03, it is Realme Chongqing Mobile Telecommunications Corp.,Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix A4CF03?
A4CF03 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 A4CF03?
Any network device with a MAC address starting A4:CF:03 was manufactured by or for Realme Chongqing Mobile Telecommunications Corp.,Ltd..