What this means
The IEEE assigned the MA-L block 642184 to Nippon Denki Kagaku 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 64:21:84, it is Nippon Denki Kagaku Co.,LTD hardware.
Frequently Asked Questions
Who owns MAC prefix 642184?
642184 is registered to Nippon Denki Kagaku 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. Nippon Denki Kagaku Co.,LTD's block covers 16,777,216 addresses.
What devices use 642184?
Any network device with a MAC address starting 64:21:84 was manufactured by or for Nippon Denki Kagaku Co.,LTD.