Telecommunication Company of Iran

Telecommunication Company of Iran, or TCI (Persian: شرکت مخابرات ایران, romanized: Sherkat-e Moxāberāt-e Irān), is the fixed-line incumbent operator in Iran offering services in fixed telephony, DSL and data services for both residential and business customers, all throughout the country. It was established in 1971 with a new organizational structure as the main responsible administration for the entire telecommunication affairs.

Source: Wikipedia — Telecommunication Company of Iran (CC BY-SA 4.0)