International Quartz Limited

Any device whose MAC address begins with 00:1C:A7 has a network interface built by International Quartz Limited. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:1C:A7

Organization

International Quartz Limited

Address

2nd Floor, 2, Dai Wang Street, Hong Kong CN 852

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.