CITIC Telecom International Holdings Limited, an investment holding company, engages in the provision of international telecommunications services in Hong Kong, China, Macau, Singapore, and internationally. It provides international mobile roaming, voice, messaging, data, and value-added telecommunications services to mobile, fixed line, virtual network, internet, and over-the-top operators. The company also offers private network, EPL, SD-WAN, internet access, cloud computing, information security, cloud data centre, enterprise mobile, voice and information, and value-added services to multinational and business enterprises; internet-based communication services; and property and equipment holding services. CITIC Telecom International Holdings Limited was formerly known as CITIC 1616 Holdings Limited and changed its name to CITIC Telecom International Holdings Limited in 2010. The company was incorporated in 1997 and is headquartered in Kwai Chung, Hong Kong.