What this means
The IEEE assigned the MA-L block 64B21D to Chengdu Phycom Tech 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 64:B2:1D, it is Chengdu Phycom Tech Co., Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 64B21D?
64B21D is registered to Chengdu Phycom Tech 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. Chengdu Phycom Tech Co., Ltd.'s block covers 16,777,216 addresses.
What devices use 64B21D?
Any network device with a MAC address starting 64:B2:1D was manufactured by or for Chengdu Phycom Tech Co., Ltd..