BrightSign LLC

Any device whose MAC address begins with 90:AC:3F has a network interface built by BrightSign 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

90:AC:3F

Organization

BrightSign LLC

Address

16795 Lark Ave. Los Gatos CA US 95032

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.