Castlenet Technology Inc.

Any device whose MAC address begins with 18:48:59 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

18:48:59

Organization

Castlenet Technology Inc.

Address

5th Fl., No.159-1, Sec.3, Beishen Rd., Shenkeng Dist., New Taipei City TW 222004

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.