GERSTEL GmbH & Co. KG

Any device whose MAC address begins with 00:07:78 has a network interface built by GERSTEL 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

00:07:78

Organization

GERSTEL GmbH & Co. KG

Address

Eberhard-Gerstel-Platz 1 Mülheim an der Ruhr DE

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.