What this means
The IEEE assigned the MA-L block 6437A4 to TOKYOSHUHA 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 64:37:A4, it is TOKYOSHUHA CO.,LTD. hardware.
Frequently Asked Questions
Who owns MAC prefix 6437A4?
6437A4 is registered to TOKYOSHUHA 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. TOKYOSHUHA CO.,LTD.'s block covers 16,777,216 addresses.
What devices use 6437A4?
Any network device with a MAC address starting 64:37:A4 was manufactured by or for TOKYOSHUHA CO.,LTD..