WIESEMANN & THEIS GMBH

Any device whose MAC address begins with 00:C0:3D has a network interface built by WIESEMANN & THEIS 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

00:C0:3D

Organization

WIESEMANN & THEIS GMBH

Address

WITTENER STR. 312 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.