Messcomp Datentechnik GmbH

Any device whose MAC address begins with D4:B4:3E has a network interface built by Messcomp Datentechnik 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:B4:3E

Organization

Messcomp Datentechnik GmbH

Address

Neudecker Str. 11 Wasserburg Bayern DE 83512

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.