Sunplus Technology Co., Ltd.

Any device whose MAC address begins with EC:EF:17 has a network interface built by Sunplus 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

EC:EF:17

Organization

Sunplus Technology Co., Ltd.

Address

19, Innovation First Road, Hsinchu Science Park Hsinchu TW 300

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.