DeTeWe-Deutsche Telephonwerke

Any device whose MAC address begins with 00:30:42 has a network interface built by DeTeWe-Deutsche Telephonwerke. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:30:42

Organization

DeTeWe-Deutsche Telephonwerke

Address

Zeughofstrasse 1 D-10997 Berlin 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.