Who owns MAC prefix 40B0A1?

40B0A1 is registered to VALCOM CO.,LTD. in the IEEE MA-L registry.

What devices use 40B0A1?

Any network device with a MAC address starting 40:B0:A1 was manufactured by or for VALCOM CO.,LTD..

MA-L · OUI prefix

VALCOM CO.,LTD.

Any MAC address starting 40:B0:A1 is registered to VALCOM CO.,LTD. in JP.

OUI prefix	40B0A1
Vendor	VALCOM CO.,LTD.
Registry	MA-L (24-bit, large block)
Country	JP
Example MAC	40:B0:A1:00:00:00

What this means

The IEEE assigned the MA-L block 40B0A1 to VALCOM 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 40:B0:A1, it is VALCOM CO.,LTD. hardware.

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