Berthold Technologies GmbH and Co.KG

Any device whose MAC address begins with 54:F6:66 has a network interface built by Berthold Technologies GmbH and 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

54:F6:66

Organization

Berthold Technologies GmbH and Co.KG

Address

Calmbacher Strasse 22 Bad Wildbad DE 75323

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.