A.D.C. GmbH

Any device whose MAC address begins with 38:06:B4 has a network interface built by A.D.C. 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

38:06:B4

Organization

A.D.C. GmbH

Address

Peter-Dornier-Str. 10 Lindau DE 88131

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.