Microtime Computer Inc.

Any device whose MAC address begins with 28:E7:94 has a network interface built by Microtime Computer 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

28:E7:94

Organization

Microtime Computer Inc.

Address

4F, No. 222, Sec. 4, Cheng-Teh Rd., Taipei TW 11167

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.