What this means
The IEEE assigned the MA-L block 1866C7 to Shenzhen Libre 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 18:66:C7, it is Shenzhen Libre Technology Co., Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 1866C7?
1866C7 is registered to Shenzhen Libre 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 Libre Technology Co., Ltd's block covers 16,777,216 addresses.
What devices use 1866C7?
Any network device with a MAC address starting 18:66:C7 was manufactured by or for Shenzhen Libre Technology Co., Ltd.