Honest Technology Co., Ltd

Any device whose MAC address begins with A4:E9:A3 has a network interface built by Honest Technology Co., 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

A4:E9:A3

Organization

Honest Technology Co., Ltd

Address

5F, KyungDong Bldg. 906-5, Daejeon KR 305-330

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.