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Telefónica Internacional operates as a holding company with interests in the telecommunications industry. The firm is based in Madrid.

Part of Tessellis SpA, A Telecom SA provides telecommunications services. The private company is based in Brooklin Novo, Brazil. The Brazilian company was founded by Frédéric A. Amar. A Telecom was acquired by Tessellis SpA on December 23, 1999 for $101.88 million.

Telefonica Moviles Argentina SA provides wireless communication services. It offers voice, data transmission, and Internet services. The company also provides wireless infrastructure, private networking, international roaming, games, GPRS, and WAP services. Telefonica Moviles Argentina was founded in 1994 and is headquartered in Buenos Aires, Argentina.

Telefónica Telecom SA provides telecommunications services. It offers fixed and mobile telephony, broadband internet, cable television subscriptions, and network administration. The firm also provides data center management, software application development, and information technology infrastructure operations. The company was founded on June 16, 2003 and is headquartered in Bogota, Colombia.

Part of Telefónica SA, Telefónica Móviles México SA is a telecommunications company based in Mexico City, Mexico. Telefónica Móviles México SA is committed to providing secure and cutting-edge technology for communication between individuals and businesses. The Mexican company values transformation and creating value for employees, customers, shareholders, and partners. The private company's Center for Privacy is a fundamental pillar of responsibility in their data economy strategy. The company was founded in 1924. The CEO is Ángel Vilá. Telefónica Móviles México SA was acquired by Telefónica Móviles España SA on December 21, 2005 for $210.43 million.

Part of Telefónica SA, Telefonica Moviles Peru Holding Saa is a holding Peruvian company. The private company is based in Lima, Peru.

Everis Spain SL provides information technology, business process outsourcing, and consulting services. Its service portfolio includes bigdata, business process outsourcing, business consulting, and everismart. The firm serves the aerospace and defense, banking, distribution and retail, health, insurance, logistics and transport, manufacturing, and utilities and energy industry. The company was founded in 1996 and is headquartered in Madrid, Spain.

Vivo SA provides cellular telecommunications services. It is a cellular operator in the states of Acre, Alagoas, Amapa, Amazonas, Bahia, Ceara, Espirito, Santo, Goias, Maranhao, Mato Grosso, Para Parana, Pernambuco, Rio Grande do Norte, Rio Grande do Sul and Rondonia. It serves the telecommunication industries. The company is headquartered in Sao Paulo, Brazil.

Telefonica Moviles Colombia SA provides mobile telcommunication services. It offers GSM services in areas such as voice, data transmission, and wireless broadband access. The company has offices in Spain, Morocco, and 14 countries in Latin America. Telefonica Moviles Colombia was founded in April 2004 and is headquartered in Bogota, Colombia.

Fundação CPqD Centro de Pesquisa e Desenvolvimento provides R&D services, and develops programs and solutions for the telecommunications, finance, energy, industrial, corporate, and public service sectors. The firm was founded in 1976, and is based in Campinas, São Paulo.

SP Telecomunicações Holding Ltda. is an investment holding private company based in São Paulo, Brazil. The Brazilian company functions as an investment holding company. The CEO of the company is Antônio Carlos Valente da Silva.

Part of Telefónica SA, Telefonica Multimedia SAC is a Peruvian company that provides cable and subscription programming services. The private company is based in Lima, Peru.

Telefónica Móviles Chile SA provides mobile telecommunications services. It offers voice and data telecommunication services through mobile telephony, data transmission, broadband internet, and enterprise applications. The company was founded in 1871 and is headquartered Santiago, Chile.

Asociación Iberoamericana de Centros de Investigación y Empresas de Telecomunicaciones operates as a telecommunication company. The company is headquartered in Bogota, Colombia.

Camara Oficial de Comercio de España en el Perú is a business association based in Lima, Peru. The Peruvian company operates as a business association.

Part of Telefónica SA, Ajato Telecomunicação Ltda. is a private company based in São Paulo, Brazil that provides television broadcasting services.

Telefónica Latinoamérica Holding SLU is a Spanish multinational telecommunications company that is part of Telefónica SA. The private company is based in Madrid, Spain and has been led by CEO Alfonso Gómez Palacio since 2019. The company's responsible business principles serve as their ethical code, and they offer a complete portfolio of products and services for individuals under their commercial brands. Additionally, they are committed to staying updated with the latest technological discoveries and have a transparency center dedicated to privacy, security, and responsible technology.

Azul & Blanco Millonarios FC SA engages in the management and operation of a sports club. The firm encourages, sponsors, organizes and develops soccer-related activities. It also acquires, sells, builds, leases, and exploits land, soccer fields, coliseums, and facilities. The company was founded by Alfonso Senior Quevedo on September 3, 1937 and is headquartered in Bogota, Colombia.

Everis BPO Brasil Serviços Complementares a Empresas Ltda. is a private company based in São Paulo, Brazil. The Brazilian company provides business processing outsourcing services.

Part of Matera Systems Informatica SA, Cinnecta do Brasil Soluções em Tecnologia SA is a data intelligence company based in Belo Horizonte, Brazil. The Brazilian company specializes in understanding customer behavior to identify opportunities to increase lifetime value. Its platform transforms the way businesses assess customer possibilities to expand profitability and loyalty, including campaign recommendations, next best offer (NBO), credit analysis, upsell, cross-sell, and churn prediction. Cinnecta has been recognized as the 5th best company to work for in the national ranking - Great Place to Work for companies with up to 99 employees and occupies the 3rd position in a category that recognizes open innovation initiatives. The private company was founded in 2013 by Eduardo Vieira Ferreira and Ricardo Vieira Ferreira, with Eduardo Vieira Ferreira serving as the CEO since then. On August 15, 2023, Cinnecta do Brasil Soluções em Tecnologia SA was acquired by Matera Systems Informatica SA.

Dom Rock engages in the provision of business digital transformation. It is involved in mapping and merging of structured and unstructured data. The company was founded by Andre Almeida, Luiz Otavio Pessoa, and Ricardo Sato and is headquartered in Barueri, Brazil.