Who owns MAC prefix 00C004?

00C004 is registered to JAPAN BUSINESS COMPUTER CO.LTD in the IEEE MA-L registry.

What devices use 00C004?

Any network device with a MAC address starting 00:C0:04 was manufactured by or for JAPAN BUSINESS COMPUTER CO.LTD.

MA-L · OUI prefix

JAPAN BUSINESS COMPUTER CO.LTD

Any MAC address starting 00:C0:04 is registered to JAPAN BUSINESS COMPUTER CO.LTD in JP.

OUI prefix	00C004
Vendor	JAPAN BUSINESS COMPUTER CO.LTD
Registry	MA-L (24-bit, large block)
Country	JP
Example MAC	00:C0:04:00:00:00

What this means

The IEEE assigned the MA-L block 00C004 to JAPAN BUSINESS COMPUTER 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:C0:04, it is JAPAN BUSINESS COMPUTER CO.LTD hardware.

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