Ingenieurbuero Stahlkopf

Any device whose MAC address begins with 38:42:A6 has a network interface built by Ingenieurbuero Stahlkopf. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

38:42:A6

Organization

Ingenieurbuero Stahlkopf

Address

Ingenieurbuero Stahlkopf Glockengießerweg 2 Bielefeld DE 33659

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.