Total Walther GmbH

Any device whose MAC address begins with A4:DE:50 has a network interface built by Total Walther 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

A4:DE:50

Organization

Total Walther GmbH

Address

Frankfurter Ring 17 Munich DE 80807

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.