Roku, Inc.

Any device whose MAC address begins with AC:3A:7A has a network interface built by Roku, 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

AC:3A:7A

Organization

Roku, Inc.

Address

12980 Saratoga Ave Saratoga US 95070

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.