This article is about the Chilean telecommunications company. For the similarly named media company, see the article on CTC Media (CTCM).

Compa a De Telecomunicaciones De Chile S.A. (CTC), or Telefonica CTC Chile, is the largest telecommunications company in Chile. The company provides local fixed-line telephony, as well as domestic and international long distance services. It also offers value-added services, such as Internet access, networking and software sales, telemarketing, and information system services. There are six providers of broadband services in Chile. Two of the six (VTR and Metropolis Intercom) provide broadband access via cable modems, three (Telefonica CTC Chile, Telefonica del Sur, and Telefonica Manquehue) provide access via ADSL (asynchronous digital subscriber line), while Entel provides connections with ADSL and wireless local loop technology. The company sold its mobile communication services business to Telefonica Moviles for $1.3 billion in July 2004 as the Chilean wireless market was approximately 60% penetrated, and the company was expecting intensified competition resulting in lower levels of profitability. In 2006, CTC derived 76.5% of its revenue from fixed telecommunications, 13.2% from corporate communications services and 10.3% from long distance operations.

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