Who owns MAC prefix 7C738B?

7C738B is registered to Cocoon Alarm Ltd in the IEEE MA-L registry.

What devices use 7C738B?

Any network device with a MAC address starting 7C:73:8B was manufactured by or for Cocoon Alarm Ltd.

MA-L · OUI prefix

Cocoon Alarm Ltd

Any MAC address starting 7C:73:8B is registered to Cocoon Alarm Ltd.

OUI prefix	7C738B
Vendor	Cocoon Alarm Ltd
Registry	MA-L (24-bit, large block)
Example MAC	7C:73:8B:00:00:00

What this means

The IEEE assigned the MA-L block 7C738B to Cocoon Alarm 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 7C:73:8B, it is Cocoon Alarm Ltd hardware.

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