What this means
The IEEE assigned the MA-L block 3C4015 to 12mm Health Technology (Hainan) 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 3C:40:15, it is 12mm Health Technology (Hainan) Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 3C4015?
3C4015 is registered to 12mm Health Technology (Hainan) 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. 12mm Health Technology (Hainan) Co., Ltd.'s block covers 16,777,216 addresses.
What devices use 3C4015?
Any network device with a MAC address starting 3C:40:15 was manufactured by or for 12mm Health Technology (Hainan) Co., Ltd..