Telefónica, S.A. is a Spanish multinational telecommunications company. It has headquarters as well as a registered office in Madrid, Spain. It is one of the largest telephone operators and mobile network providers in the world. It provides fixed and mobile telephony, broadband, and subscription television, operating in Europe and the Americas. Along with its Telefónica brand, it also trades as Movistar, O2, and Vivo. The company is a component of the Euro Stoxx 50 stock market index. On 15 April 2012, Telefónica shut down TVA and Ajacto, which unified the brand into Vivo. Wikipedia