What this means
The IEEE assigned the MA-L block 647D81 to YOKOTA INDUSTRIAL 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 64:7D:81, it is YOKOTA INDUSTRIAL CO,.LTD hardware.
Frequently Asked Questions
Who owns MAC prefix 647D81?
647D81 is registered to YOKOTA INDUSTRIAL 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. YOKOTA INDUSTRIAL CO,.LTD's block covers 16,777,216 addresses.
What devices use 647D81?
Any network device with a MAC address starting 64:7D:81 was manufactured by or for YOKOTA INDUSTRIAL CO,.LTD.