What this means
The IEEE assigned the MA-L block 1CEF03 to Guangzhou V-SOLUTION 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 1C:EF:03, it is Guangzhou V-SOLUTION Electronic Technology Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 1CEF03?
1CEF03 is registered to Guangzhou V-SOLUTION 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. Guangzhou V-SOLUTION Electronic Technology Co., Ltd.'s block covers 16,777,216 addresses.
What devices use 1CEF03?
Any network device with a MAC address starting 1C:EF:03 was manufactured by or for Guangzhou V-SOLUTION Electronic Technology Co., Ltd..