Carma Industries Inc.

Any device whose MAC address begins with D4:3D:67 has a network interface built by Carma Industries Inc.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

D4:3D:67

Organization

Carma Industries Inc.

Address

132 Walsh Road Lindsay Ontario CA K9V 4R3

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.