What this means
The IEEE assigned the MA-L block 002100 to Gemtek 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 00:21:00, it is Gemtek Technology Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 002100?
002100 is registered to Gemtek 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. Gemtek Technology Co., Ltd.'s block covers 16,777,216 addresses.
What devices use 002100?
Any network device with a MAC address starting 00:21:00 was manufactured by or for Gemtek Technology Co., Ltd..