Who owns MAC prefix 9C5E73?

9C5E73 is registered to Calibre UK LTD in the IEEE MA-L registry.

What devices use 9C5E73?

Any network device with a MAC address starting 9C:5E:73 was manufactured by or for Calibre UK LTD.

MA-L · OUI prefix

Calibre UK LTD

Any MAC address starting 9C:5E:73 is registered to Calibre UK LTD.

OUI prefix	9C5E73
Vendor	Calibre UK LTD
Registry	MA-L (24-bit, large block)
Example MAC	9C:5E:73:00:00:00

What this means

The IEEE assigned the MA-L block 9C5E73 to Calibre UK 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 9C:5E:73, it is Calibre UK LTD hardware.

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