Who owns MAC prefix 0000BD?

0000BD is registered to RYOSEI, Ltd. in the IEEE MA-L registry.

What devices use 0000BD?

Any network device with a MAC address starting 00:00:BD was manufactured by or for RYOSEI, Ltd..

MA-L · OUI prefix

RYOSEI, Ltd.

Any MAC address starting 00:00:BD is registered to RYOSEI, Ltd. in JP.

OUI prefix	0000BD
Vendor	RYOSEI, Ltd.
Registry	MA-L (24-bit, large block)
Country	JP
Example MAC	00:00:BD:00:00:00

What this means

The IEEE assigned the MA-L block 0000BD to RYOSEI, 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 00:00:BD, it is RYOSEI, Ltd. hardware.

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