Hugo Brennenstuhl Gmbh & Co. KG.

Any device whose MAC address begins with 20:4C:6D has a network interface built by Hugo Brennenstuhl 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

20:4C:6D

Organization

Hugo Brennenstuhl Gmbh & Co. KG.

Address

Seestr. 1-3 Tuebingen Baden-Wuerttemberg DE 72074

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.