GDI LLC

Any device whose MAC address begins with 00:1F:DD has a network interface built by GDI 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

00:1F:DD

Organization

GDI LLC

Address

One MidAmerica Plaza Oakbrook Terrace IL US 60181

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.