Who owns MAC prefix 000CAC?

000CAC is registered to Citizen Watch Co., Ltd. in the IEEE MA-L registry.

What devices use 000CAC?

Any network device with a MAC address starting 00:0C:AC was manufactured by or for Citizen Watch Co., Ltd..

MA-L · OUI prefix

Citizen Watch Co., Ltd.

Any MAC address starting 00:0C:AC is registered to Citizen Watch Co., Ltd. in JP.

OUI prefix	000CAC
Vendor	Citizen Watch Co., Ltd.
Registry	MA-L (24-bit, large block)
Country	JP
Example MAC	00:0C:AC:00:00:00

What this means

The IEEE assigned the MA-L block 000CAC to Citizen Watch 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 00:0C:AC, it is Citizen Watch Co., Ltd. hardware.

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