Telink Semiconductor (Taipei) Co. Ltd.

Any device whose MAC address begins with A4:C1:38 has a network interface built by Telink Semiconductor (Taipei) 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:C1:38

Organization

Telink Semiconductor (Taipei) Co. Ltd.

Address

Room 1050. 10F. Buld. H, No. 3-2 YuanQu St., Taipei Taipei TW 11503

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.