Alfred Kaercher GmbH & Co KG

Any device whose MAC address begins with A4:09:CB has a network interface built by Alfred Kaercher GmbH & Co KG. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

A4:09:CB

Organization

Alfred Kaercher GmbH & Co KG

Address

Alfred Kaercher Gmbh & Co KG Winnenden Baden-Wuerttemberg DE 71364

Source

IEEE OUI registry

Have a full MAC address? Look it up— we'll also tell you if it's a randomized (private) address rather than a real manufacturer prefix.