What this means
The IEEE assigned the MA-M block 64FB81D to Dongyang unitech.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:FB:81:D, it is Dongyang unitech.co.ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 64FB81D?
64FB81D is registered to Dongyang unitech.co.ltd in the IEEE MA-M registry.
What does the MA-M registry type mean?
An MA-M assignment covers 28 bits of the address, giving the vendor 1,048,576 device addresses, a quarter of a full MA-L block. Dongyang unitech.co.ltd's block covers 1,048,576 addresses.
What devices use 64FB81D?
Any network device with a MAC address starting 64:FB:81:D was manufactured by or for Dongyang unitech.co.ltd.