Who owns MAC prefix 001220?

001220 is registered to Cadco Systems in the IEEE MA-L registry.

What devices use 001220?

Any network device with a MAC address starting 00:12:20 was manufactured by or for Cadco Systems.

MA-L · OUI prefix

Cadco Systems

Any MAC address starting 00:12:20 is registered to Cadco Systems in US.

OUI prefix	001220
Vendor	Cadco Systems
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	00:12:20:00:00:00

What this means

The IEEE assigned the MA-L block 001220 to Cadco Systems. 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 00:12:20, it is Cadco Systems hardware.

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