Preceno Technology Pte.Ltd.

Any device whose MAC address begins with 28:39:E7 has a network interface built by Preceno Technology Pte.Ltd.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

28:39:E7

Organization

Preceno Technology Pte.Ltd.

Address

11F, No.207-2, Sec. 3, Beixin Rd., Xindian Dist. New Taipei City TW 23143

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.