What this means
The IEEE assigned the MA-L block 203CC0 to Beijing Tosee 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 20:3C:C0, it is Beijing Tosee Technology Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 203CC0?
203CC0 is registered to Beijing Tosee 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. Beijing Tosee Technology Co., Ltd.'s block covers 16,777,216 addresses.
What devices use 203CC0?
Any network device with a MAC address starting 20:3C:C0 was manufactured by or for Beijing Tosee Technology Co., Ltd..