Castlenet Technology Inc.

Any device whose MAC address begins with FC:4A:E9 has a network interface built by Castlenet Technology Inc.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

FC:4A:E9

Organization

Castlenet Technology Inc.

Address

5F., No. 10, Daye Rd., Beitou Dist. Taipei City TW 112030

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.