CIS TECHNOLOGY INC.

Any device whose MAC address begins with 00:20:18 has a network interface built by CIS 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

00:20:18

Organization

CIS TECHNOLOGY INC.

Address

FL. 9-1, NO. 94, PAO CHUNG RD. TAIPEI HSIEN TW

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.