Who owns MAC prefix ACA919?

ACA919 is registered to TrekStor GmbH in the IEEE MA-L registry.

What devices use ACA919?

Any network device with a MAC address starting AC:A9:19 was manufactured by or for TrekStor GmbH.

MA-L · OUI prefix

TrekStor GmbH

Any MAC address starting AC:A9:19 is registered to TrekStor GmbH in DE.

OUI prefix	ACA919
Vendor	TrekStor GmbH
Registry	MA-L (24-bit, large block)
Country	DE
Example MAC	AC:A9:19:00:00:00

What this means

The IEEE assigned the MA-L block ACA919 to TrekStor GmbH. 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:A9:19, it is TrekStor GmbH hardware.

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