CITIC Telecom International Holdings Limited, an investment holding company, engages in the provision of international telecommunications services worldwide. It provides carrier services, such as mobile, roaming, voice, messaging, data, and value-added telecommunications services, as well as mobile operators, fixed line operators, virtual network operators, internet operators, and OTT operators. The company offers enterprise solutions, including virtual private network connectivity, data center, cloud computing, information security, enterprise mobile services, and voice and information services; and Internet-based communication services. The company was formerly known as CITIC 1616 Holdings Limited and changed its name to CITIC Telecom International Holdings Limited in 2010. CITIC Telecom International Holdings Limited was incorporated in 1997 and is headquartered in Kwai Chung, Hong Kong. CITIC Telecom International Holdings Limited operates as a subsidiary of CITIC Limited.