E. Baysal, MehmetAltun, DidemToklu, Bilal2015-04-012015-04-012007Journal of Science and Technology 1 (1), 2007, 58-711307-3818The knowledge has become very important significantly owing to the technologic developments over the world. It has been obviously seen that the societies accessing the knowledge easily, develop in terms of social and economic more rapidly than the others. This situation emphasizes importance to the telecommunication sector providing the infrastructure necessary for transferring the information. As an incumbent operator, with its subunits Türk Telekomünikasyon A.Ş. is responsible for dispersing the telecommunication services all over the country. The Province Telecom Directorships have an important role in operating the telecommunication services, providing these services to customers and constructing the infrastructure for these services. In this study for the purpose of providing service quality and customer satisfaction all over the country and using the sources conveniently, an efficiency analysis of The Province Telecom Directorships is performed by using data envelopment analysis. This study consists of two stages. In the first stage efficient Province Telecom Directorships and the Province Telecom Directorships reference to the inefficient Province Telecom Directorships in order to provide them locating in the efficient frontier is determined by using the CCR formulation based on the constant returns to scale assumption. In the second stage of the study The Province Telecom Directorships determined efficient according to the CCR formulation are ranked by using cross efficiency.enData envelopment analysisTelecommunicationCross efficiencyArticle