Who owns MAC prefix B838CA?

B838CA is registered to Kyokko Tsushin System CO.,LTD in the IEEE MA-L registry.

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.

MA-L · OUI prefix

Kyokko Tsushin System CO.,LTD

Any MAC address starting B8:38:CA is registered to Kyokko Tsushin System CO.,LTD in JP.

OUI prefix	B838CA
Vendor	Kyokko Tsushin System CO.,LTD
Registry	MA-L (24-bit, large block)
Country	JP
Example MAC	B8:38:CA:00:00:00

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.

Look up another MAC