Who owns MAC prefix 3C479B?

3C479B is registered to Theissen Training Systems, Inc. in the IEEE MA-L registry.

What devices use 3C479B?

Any network device with a MAC address starting 3C:47:9B was manufactured by or for Theissen Training Systems, Inc..

MA-L · OUI prefix

Theissen Training Systems, Inc.

Any MAC address starting 3C:47:9B is registered to Theissen Training Systems, Inc. in US.

OUI prefix	3C479B
Vendor	Theissen Training Systems, Inc.
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	3C:47:9B:00:00:00

What this means

The IEEE assigned the MA-L block 3C479B to Theissen Training Systems, Inc.. 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 3C:47:9B, it is Theissen Training Systems, Inc. hardware.

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