Who owns MAC prefix 4012E4?

4012E4 is registered to Compass-EOS in the IEEE MA-L registry.

What devices use 4012E4?

Any network device with a MAC address starting 40:12:E4 was manufactured by or for Compass-EOS.

MA-L · OUI prefix

Compass-EOS

Any MAC address starting 40:12:E4 is registered to Compass-EOS in IL.

OUI prefix	4012E4
Vendor	Compass-EOS
Registry	MA-L (24-bit, large block)
Country	IL
Example MAC	40:12:E4:00:00:00

What this means

The IEEE assigned the MA-L block 4012E4 to Compass-EOS. 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 40:12:E4, it is Compass-EOS hardware.

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