CCT R&D Limited

Any device whose MAC address begins with 00:19:83 has a network interface built by CCT R&D 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

00:19:83

Organization

CCT R&D Limited

Address

18/F CCT Telecom Building Fotan, Shatin N.T. HK 000

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.