Who owns MAC prefix 0009B3?

0009B3 is registered to MCM Systems Ltd in the IEEE MA-L registry.

What devices use 0009B3?

Any network device with a MAC address starting 00:09:B3 was manufactured by or for MCM Systems Ltd.

MA-L · OUI prefix

MCM Systems Ltd

Any MAC address starting 00:09:B3 is registered to MCM Systems Ltd in SI.

OUI prefix	0009B3
Vendor	MCM Systems Ltd
Registry	MA-L (24-bit, large block)
Country	SI
Example MAC	00:09:B3:00:00:00

What this means

The IEEE assigned the MA-L block 0009B3 to MCM Systems 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 00:09:B3, it is MCM Systems Ltd hardware.

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