Surtalina Telecom

1974-1993
CTS was founded in 1974 as a spin-off from Companhia Surtalina de Correios, Telefones e Telégrafos.

1993-1999
In 1993, CTS' acronym meaning was changed to Companhia de Telecomunicações Surtalina to better reflect its other services outside landline telephony (such as its fledgling mobile telephony and cable television services).

1999-2007
In 1999, CTS' name was simplified to Surtalina Telecom (usually shortened to Surtatel, then to ST since 2015).