What this means
The IEEE assigned the MA-L block A40C66 to Shenzhen Colorful Yugong Technology and Development 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 A4:0C:66, it is Shenzhen Colorful Yugong Technology and Development Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix A40C66?
A40C66 is registered to Shenzhen Colorful Yugong Technology and Development 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 Colorful Yugong Technology and Development Co., Ltd.'s block covers 16,777,216 addresses.
What devices use A40C66?
Any network device with a MAC address starting A4:0C:66 was manufactured by or for Shenzhen Colorful Yugong Technology and Development Co., Ltd..