Who owns MAC prefix AC4122?

AC4122 is registered to Eclipse Electronic Systems Inc. in the IEEE MA-L registry.

What devices use AC4122?

Any network device with a MAC address starting AC:41:22 was manufactured by or for Eclipse Electronic Systems Inc..

MA-L · OUI prefix

Eclipse Electronic Systems Inc.

Any MAC address starting AC:41:22 is registered to Eclipse Electronic Systems Inc. in US.

OUI prefix	AC4122
Vendor	Eclipse Electronic Systems Inc.
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	AC:41:22:00:00:00

What this means

The IEEE assigned the MA-L block AC4122 to Eclipse Electronic 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 AC:41:22, it is Eclipse Electronic Systems Inc. hardware.

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