Who owns MAC prefix 00043C?

00043C is registered to SONOS Co., Ltd. in the IEEE MA-L registry.

What devices use 00043C?

Any network device with a MAC address starting 00:04:3C was manufactured by or for SONOS Co., Ltd..

MA-L · OUI prefix

SONOS Co., Ltd.

Any MAC address starting 00:04:3C is registered to SONOS Co., Ltd. in KR.

OUI prefix	00043C
Vendor	SONOS Co., Ltd.
Registry	MA-L (24-bit, large block)
Country	KR
Example MAC	00:04:3C:00:00:00

What this means

The IEEE assigned the MA-L block 00043C to SONOS 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 00:04:3C, it is SONOS Co., Ltd. hardware.

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