Macro Image Technology, Inc.

Any device whose MAC address begins with 40:37:AD has a network interface built by Macro Image Technology, 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

40:37:AD

Organization

Macro Image Technology, Inc.

Address

East Bldg., 6th Floor, IT Venture Tower, Seoul KR 138-950

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.