Preh Car Connect GmbH

Any device whose MAC address begins with 40:FA:7F has a network interface built by Preh Car Connect GmbH. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

40:FA:7F

Organization

Preh Car Connect GmbH

Address

Gewerbepark 5 Dresden DE 01156

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.