MST CORPORATION

Any device whose MAC address begins with 14:A9:E3 has a network interface built by MST 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

14:A9:E3

Organization

MST CORPORATION

Address

4th Floor Lawford House London England GB N3 1 RL

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.