What this means
The IEEE assigned the MA-L block 143B42 to Realfit(Shenzhen) Intelligent 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 14:3B:42, it is Realfit(Shenzhen) Intelligent Technology Co., Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 143B42?
143B42 is registered to Realfit(Shenzhen) Intelligent 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. Realfit(Shenzhen) Intelligent Technology Co., Ltd's block covers 16,777,216 addresses.
What devices use 143B42?
Any network device with a MAC address starting 14:3B:42 was manufactured by or for Realfit(Shenzhen) Intelligent Technology Co., Ltd.