Acentic GmbH

Any device whose MAC address begins with D4:C7:66 has a network interface built by Acentic 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

D4:C7:66

Organization

Acentic GmbH

Address

Venloer Strasse 151-153 Cologne DE 50672

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.