Gen IV Technology LLC

Any device whose MAC address begins with D4:41:3F has a network interface built by Gen IV Technology LLC. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

D4:41:3F

Organization

Gen IV Technology LLC

Address

5239 Muhlhauser Road West Chester OH US 45011

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.