What this means
The IEEE assigned the MA-L block 1CB3E9 to Shenzhen Zhongke United Communication Technology. 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 1C:B3:E9, it is Shenzhen Zhongke United Communication Technology hardware.
Frequently Asked Questions
Who owns MAC prefix 1CB3E9?
1CB3E9 is registered to Shenzhen Zhongke United Communication Technology 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 Zhongke United Communication Technology's block covers 16,777,216 addresses.
What devices use 1CB3E9?
Any network device with a MAC address starting 1C:B3:E9 was manufactured by or for Shenzhen Zhongke United Communication Technology.