Gruppo TIM

==Società Idroelettrica Pont Saint Martin==
===1887–1916===
The company was founded as Società Idroelettrica Pont Saint Martin.
==Società Idroelettrica Piemontese==
===1916–1926===
In 1916 Società Idroelettrica Pont Saint Martin became Società Idroelettrica Piemontese (SIP).
===1926–1964===
==Società Italiana per l'Esercizio Telefonico==
===1964–1983===
In 1964 Società Idroelettrica Piemontese (SIP) was merged with Società Telefonica Interregionale Piemontese e Lombarda (STIPEL), Società Telefonica delle Venezie (TELVE), Telefoni Italia Media Orientale (TIMO), Società Telefonica Tirrena (TETI) and Società Esercizi Telefonici (SET) as Società Italiana per l'Esercizio Telefonico (SIP).
===1966–19??===
===1983–1994===
==Telecom Italia==
===1994–2003===
===2003–2016===
The number of waves was reduced from four to three.
In 2015 Telecom Italia's network operations were merged into the TIM brand.
===2016–2019===
==Gruppo TIM==
===2019–present===
Category:Telecommunications
Category:Italy
 
Category:Telephone companies in Italy
Category:Telecommunications companies in Italy
Category:1994
Category:Vivendi
Category:Open Handset Alliance