Northern Digital, Inc.

Any device whose MAC address begins with 00:05:AC has a network interface built by Northern Digital, 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

00:05:AC

Organization

Northern Digital, Inc.

Address

103 Randall Drive Waterloo Ontario CA N2V 1C5

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.