What this means
The IEEE assigned the MA-L block CCEF03 to Hunan Keyshare Communication 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 CC:EF:03, it is Hunan Keyshare Communication Technology Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix CCEF03?
CCEF03 is registered to Hunan Keyshare Communication 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. Hunan Keyshare Communication Technology Co., Ltd.'s block covers 16,777,216 addresses.
What devices use CCEF03?
Any network device with a MAC address starting CC:EF:03 was manufactured by or for Hunan Keyshare Communication Technology Co., Ltd..