What this means
The IEEE assigned the MA-L block 3C1640 to Qingdao Haier 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 3C:16:40, it is Qingdao Haier Technology Co.,Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 3C1640?
3C1640 is registered to Qingdao Haier 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. Qingdao Haier Technology Co.,Ltd's block covers 16,777,216 addresses.
What devices use 3C1640?
Any network device with a MAC address starting 3C:16:40 was manufactured by or for Qingdao Haier Technology Co.,Ltd.