SMG Holdings LLC

Any device whose MAC address begins with 18:D5:B6 has a network interface built by SMG Holdings 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

18:D5:B6

Organization

SMG Holdings LLC

Address

205 N Michigan Ave Chicago IL US 60601

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.