What this means
The IEEE assigned the MA-L block 00221F to eSang Technologies 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 00:22:1F, it is eSang Technologies Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 00221F?
00221F is registered to eSang Technologies 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. eSang Technologies Co., Ltd.'s block covers 16,777,216 addresses.
What devices use 00221F?
Any network device with a MAC address starting 00:22:1F was manufactured by or for eSang Technologies Co., Ltd..