PT Telekomunikasi Selular, trading as Telkomsel, is an Indonesian telecommunications company founded in 1995. Its ownership is divided between Telkom Indonesia (69.9%) and Singtel (30.1%), which serves as Telkom's consumer services arm starting 1 July 2023 by its management takeover of IndiHome. It is headquartered alongside Telkom in the Telkom Landmark Complex.

PT Telekomunikasi Indonesia (Persero) Tbk officially shortened into PT Telkom Indonesia (Persero) Tbk, also simply known as Telkom, is an Indonesian multinational telecommunications conglomerate with its corporate headquarters in Bandung and its operational headquarters in the Telkom Landmark Complex in Jakarta. Telkom is listed on the Indonesia Stock Exchange and has a secondary listing on the New York Stock Exchange. The government of Indonesia owns over half of Telkom's shares outstanding.