Who owns MAC prefix 000404?

000404 is registered to Makino Milling Machine Co., Ltd. in the IEEE MA-L registry.

What devices use 000404?

Any network device with a MAC address starting 00:04:04 was manufactured by or for Makino Milling Machine Co., Ltd..

MA-L · OUI prefix

Makino Milling Machine Co., Ltd.

Any MAC address starting 00:04:04 is registered to Makino Milling Machine Co., Ltd. in JP.

OUI prefix	000404
Vendor	Makino Milling Machine Co., Ltd.
Registry	MA-L (24-bit, large block)
Country	JP
Example MAC	00:04:04:00:00:00

What this means

The IEEE assigned the MA-L block 000404 to Makino Milling Machine 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 00:04:04, it is Makino Milling Machine Co., Ltd. hardware.

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