Qisda Corporation

Any device whose MAC address begins with C0:C4:F9 has a network interface built by Qisda Corporation. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

C0:C4:F9

Organization

Qisda Corporation

Address

No. 157, Shanying Rd., Gueishan Dist., Taoyuan City 33341, Taiwan Taoyuan TW 33341

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.