What this means
The IEEE assigned the MA-L block EC542E to Shanghai XiMei Electronic 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 EC:54:2E, it is Shanghai XiMei Electronic Technology Co. Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix EC542E?
EC542E is registered to Shanghai XiMei Electronic 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. Shanghai XiMei Electronic Technology Co. Ltd's block covers 16,777,216 addresses.
What devices use EC542E?
Any network device with a MAC address starting EC:54:2E was manufactured by or for Shanghai XiMei Electronic Technology Co. Ltd.