Turkcell Iletisim Hizmetleri A.S. ("Turkcell"), a joint stock company organized and existing under the laws of the Republic of Turkey, was formed in 1993 and commenced operations in 1994. Our principal shareholder is Turkcell Holding A.S., which holds 51.00% of Turkcell's shares based on the Company's share book. Based on publicly-available information, we believe that Turkcell Holding A.S. is 52.91% owned by Cukurova Telecom Holdings Limited and 47.09% by Telia Sonera Finland Oyj. Based on publicly-available information, we believe that Cukurova Telecom Holdings Limited is 51% owned by Cukurova Finance International Limited and 49% by Alfa Telecom Turkey Limited.
The address of our principal office is Turkcell Iletisim Hizmetleri A.S., Turkcell Kucukyali Plaza, Aydinevler Mahallesi Inonu Caddesi No:20 Kucukyali Ofispark, Maltepe, Istanbul, Turkey. Our telephone number is +90 (212) 313 10 00. Our website address is www.turkcell.com.tr. In July 2000, we completed our initial public offering with the listing of our ordinary shares on the Borsa Istanbul and our ADSs on NYSE.
We operate under a 25-year GSM license granted in April 1998, a 20-year 3G license granted in April 2009 and a 13-year 4.5G authorization certificate granted in April 2016.