WESTERN DIGITAL

Any device whose MAC address begins with 00:90:A9 has a network interface built by WESTERN DIGITAL. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:90:A9

Organization

WESTERN DIGITAL

Address

1599 NORTH BROADWAY ROCHESTER MN US 55906

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.