Data Device Corporation

Any device whose MAC address begins with 00:A0:55 has a network interface built by Data Device Corporation. 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:A0:55

Organization

Data Device Corporation

Address

105 Wilbur Place Bohemia NY US 11716

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.