What this means
The IEEE assigned the MA-L block B838CA to Kyokko Tsushin System 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 B8:38:CA, it is Kyokko Tsushin System CO.,LTD hardware.
Frequently Asked Questions
Who owns MAC prefix B838CA?
B838CA is registered to Kyokko Tsushin System 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. Kyokko Tsushin System CO.,LTD's block covers 16,777,216 addresses.
What devices use B838CA?
Any network device with a MAC address starting B8:38:CA was manufactured by or for Kyokko Tsushin System CO.,LTD.