Menüye ulaşmak için tıklayınız Sayfa içeriğine ulaşmak için tıklayınız


Show All


During the Ottoman Empire, in line with the modernization efforts brought by the Gülhane Rescript of 1839 the first Postal Service Regulation entered into force in 1840 in order to establish an organized Postal Service similar to those in operation in Europe.

To this end, the Postal Ministry and the first postal authority, called the Postahane-i Amire were established.


In 1843, 11 years after the invention of the telegraph, telegraph services began in Turkey, and in 1855, a separate department, the Telegraph Department was established.


In 1871, the Postal Ministry and Telegraph Department were united under one roof and transformed into the Postal and Telegraph Ministry.


After bringing into service Istanbul's first manual telephone exchange on 29th May 1909, the Postal and Telegraph Ministry was transformed into the Ministry of Post, Telegraph and Telephony in 1909, and then in 1913, was renamed the General Directorate of Post, Telegraph and Telephony.

February 1924

Pursuant to Telephone and Telegraph Law No. 406, the duty of establishing and operating telephone services nationwide was granted to the General Directorate of the PTT.

September 1926

Turkey's first automatic telephone exchange with 2000 line capacity was put into service in Ankara.

September 1929

The first intercity communication through an intercity trunk was realized between Ankara and Istanbul.

The General Directorate of the PTT, under the control of the Ministry of Internal Affairs in the early years of our Republic, was placed under the authority of the Ministry of Public Works as an annexed budget institution in 1933, and thereafter under the authority of the Ministry of Transportation in 1939.

November 1973

The first automatic telex exchange was established.

April 1976

A multi-channel foreign communication service was provided via the first submarine coaxial cable with total of 480 channels, was and was put into service between Antalya and Catania.

April 1979

Communication with 13 countries was provided over INTELSAT by using the satellites of the Atlantic region upon bringing the first satellite earth station into service.

March 1982

Installation of pay telephone stations suitable also for intercity and overseas calls was started.

December 1984

Turkey's first digital telephone exchange entered operation in Kavaklıdere, Ankara.

April 1985

Fiber optic cable, increasing channel capacity, was installed underground between Ankara (Ulus) and the Gölbaşı satellite earth station for the first time, and a 140 Mb/s system of 1310 nm wavelength was put into operation.

November 1985

The first radio link system was brought into service between Ankara and Istanbul.

October 1986

The mobile telephony system was brought into service in Ankara and Istanbul with a paging system in Ankara, Istanbul and Izmir.

March 1987

The first video conference in Europe over a satellite system was realized in Turkey.

July 1987

The first fiber optic cable between the provinces was installed aerially between Aydın and Denizli.

December 1988

A cable-TV service was brought into service for the first time in Çankaya, Ankara.


The first Packet Switching Data Network, TURPAK was installed.

December 1990

  • A contract for "TURKSAT Satellites" was executed with French Firm Aérospatiale.
  • With the EMOS1 Project, communication via fiber optic submarine cable system was provided between Italy, Greece, Turkey and the Middle East.


Low-capacity digital radio link systems were brought into service to enable the transmission of exchanges in rural areas.


Türk Telekom was established on June 30, 1994.


PTT's telecommunication and postal services divisions were separated on April 24, 1995. All personnel, assets and liabilities related to the telecommunications services of PTT were subsequently transferred to Türk Telekom, which was wholly owned by the Republic of Turkey Prime Ministry Undersecretariat of the Treasury.


  • A submarine Fiber Optic Cable System covering Turkey-Italy-Ukraine-Russia (ITUR) was bought into service.
  • The frame Relay service, which enables high speed data transfer over the TUPRAK network, was brought into service with the addition of passport modules.
  • Turkey's National Internet Backbone network (TURNET) was brought into service.

April 1996

NO 7, a signaling system between exchanges that constitutes voice, data and image transmission infrastructure, said Hello to Turkey.

June 1996

Turkey's second satellite TURKSAT 1C was launched into space.

November 1996

The contract establishing Eurasiasat, a joint venture company formed by Türk Telecom and Aeorspatiale, producing Türksat satellites, was signed.

November 1996

The Frame Relay service, which enables high speed data transfer was brought into services


  • The National Academic Web (ULAKNET) Project, connecting all universities in Turkey over the TURPAK network was realized.
  • KAFOS (Black Sea Fiber Optic System) and TBL (Land Fiber Optic System for Trans Balkan Link) were brought into operation.

April 1998

The GSM license was transferred to the two firms of Turkcell and Telsim for 25 years.

July 1999

The wireless telephony system (KTS), which provides wireless access to local exchanges, was brought into service.


  • Our company started to provide services such as 115, 121, 122, 123, 126, 131, 163, etc., which had previously been given through an operator, over Interactive Voice Response.
  • Cable Internet applications commenced on Cable TV.

January 2000

The KİT (State Economic Enterprise) status of Türk Telekom was canceled pursuant to Law No. 4502 published in the Official Gazette of the Republic of Turkey No. 23948, and it became a joint stock company subject to the provisions of private law.

January 2001

Ordered for production by EURASIASAT, the joint venture formed by Türk Telekom and Alcatel, the TÜRKSAT 2A satellite was launched into space from Kourou in South America.

May 2001

CLIP (Calling Line Identification Presentation) and CLIR (Calling Line Identification Restriction) features were brought into service over fixed lines.

June 2001

The İLSİS Project was realized in order to enable Provincial Directorates of National Education to conduct their computing environment operations with internet access.


Total Quality Management (TKY) pilot project applications commenced at Telekom's Yalova and Balıkesir Provincial Directorates.

February 2002

Our company became a member of International Telecommunications Union (ITU), and as a sector operator, a member of the following organizations; the ITU Radiocommunication Sector (ITU-R), the ITU Telecommunication Standardization Sector (ITU-T), and the ITU Telecommunication Development Sector (ITU-D).

March 2002

Implementation of the MERNİS Project developed to conduct population studies in the computing environment, and the infrastructure of which was provided by our Company, commenced.

October 2003

The first Metro Ethernet applications on a trial basis commenced.

December 2003

A joint project with the Ministry of National Education was begun to provide 42,500 schools with internet connection via an ADSL service.


TT & TİM İletişim Hizmetleri A.Ş. was founded on February 19, 2004 through the merger of Türk Telekom's GSM Operator, Aycell, and İş-TİM.

The trade name TT & TİM İletişim Hizmetleri A.Ş was changed to Avea İletişim Hizmetleri A.Ş. on October 15, 2004.


Türk Telekom's privatization was completed on November 14, 2005, with the transfer of 55% of Türk Telekom shares to Oger Joint Venture Group.


Türk Telekom subsidiary TTNET was established on April 26, 2006, commencing operations on May 14 by obtaining an internet service provider license.

Türk Telekom increased its shareholding in Avea to 81.12% with the acquisition of 40.56% of the shares of İş-TİM for USD 500 million on September 15, 2006.

May 2008

15% of Türk Telekom shares were offered to the public and listed on the Istanbul Stock Exchange on May 15, 2008.

July 2009

Avea successfully commenced 3G services.


Türk Telekom acquired Invitel International (now Türk Telekom International),on October 7, 2010, the leading wholesale capacity and data services provider in Central and Eastern Europe.


Türk Telekom distributed TL 2.244 billion – its entire 2010 distributable profit – to shareholders in gross cash dividends on 30 May 2011, breaking an all-time record in the history of the Istanbul Stock Exchange.

Türk Telekom became Turkey's first telecommunications company to report its carbon emissions to the Carbon Disclosure Project (CDP).


Türk Telekom increased its total shareholding in Avea to 89.99%.


TTNET and Sobee, two wholly owned Türk nTelekom subsidiaries, were merged with the transfer of Sobee's entire assets and business to TTNET.

On December 10, 2013, upon a resolution adopted by the Board of Directors Türk Telekom announced the restructuring of its executive leadership by combining the roles of Group CEO and General Manager into a single CEO position and removing the Group CFO position.

June 2014

Türk Telekom's overseas bond offering of up to USD 1 billion (or its equivalent in other foreign currency or Turkish Lira) with a maturity of up to 10 years was oversubscribed eight times by investors from a broad geography. The transaction was the largest corporate bond issue as well as the first-ever dual tranche debt offering across two maturities issued in Turkey. Conducted in two tranches with 5-year and 10-year maturities, the bond issuance was priced at a 30 bps spread to Turkish sovereign issues of similar tenors.

International credit rating agency Fitch Ratings assigned "BBB-" (investment grade) with a stable outlook to Türk Telekom's long-term foreign and local currency issuer default ratings and assigned "BBB-" to senior unsecured rating; and affirmed the rating afterwards as part of its routine review in 2014.

International credit rating agency Standard & Poor's (S&P) upgraded the corporate credit rating of Türk Telekom from "BB+" to "BBB-" (investment grade), emphasizing that Türk Telekom had strengthened its liquidity position after a successful bond issue of USD 1 billion in June 2014.

TTNET A.Ş. purchased the Turkey media rights of UEFA Champions League andUEFA Europe League matches for three seasons beginning with the 2015-2016 season. It was announced that UEFA Champions League and UEFA Europe League football games would be broadcast via the Türk Telekom Group's digital TV broadcasting platform Tivibu. Pursuant to the contract signed with UEFA, an agreement was also reached with TRT, which became Türk Telekom's free-to-air partner.


The Türk Telekom Group, the leading telecommunications and communication technology group in Turkey, celebrated its 175th anniversary with a spectacular reception held in Ankara with the attendance of President Recep Tayyip Erdoğan.

The transfer of the shares of Avea İletişim Hizmetleri A.Ş., which were held by the İş Bank Group, to Türk Telekomünikasyon A.Ş., was completed. With the share transfer, Türk Telekom became the sole owner of Avea İletişim Hizmetleri A.Ş.

After signing a C&MA (Construction and Maintenance Agreement), Türk Telekom International joined the SEA-ME-WE-5 consortium as a full member. In order to provide the most innovative, reliable and comprehensive services with the fastest and most robust infrastructure in Turkey and the surrounding region, Türk Telekom also supported the powerful terrestrial network connecting the three continents with the submarine.

Avea İletişim Hizmetleri A.Ş., has won the below packages in the IMT Service and Infrastructure Authorization Tender (publicly known as LTE Authorization Tender) held by the Information and Communication Technologies Authority (ICTA) on August 26, 2015.

  • 2x10 MHz bandwidth in 800 MHz frequency for Euro 380,000,000,
  • 2x7.6 MHz bandwidth in 900 MHz frequency for Euro 216,819,184,
  • 2x20 MHz bandwidth in 1800 MHz frequency for Euro 310,000,000,
  • 2x10 MHz bandwidth in 2600 MHz frequency for Euro 25,858,917,
  • 1x15 MHz bandwidth in 2600 MHz frequency for Euro 22,000,000.

As a result of this tender Avea,

  • In the 800 MHz frequency, owns the cleanest and the closest package to the 700 MHz frequency, which is an important element for 5G
  • In the 900 MHz frequency, moved out of a disadvantageous position
  • In the 1800 MHz frequency, has the widest capacity, which is the most important frequency for LTE
  • Holds 175 MHz of total bandwidth.
  • Has the highest MHz per user.

Total spectrum fee is Euro 954,678,101.

Türk Telekom Group announced a partnership with Amazon Web Services (AWS) to provide the most advanced cloud computing solutions to Turkish companies. Under this partnership, all enterprises in Turkey, small or large, will be able to access virtual server services provided through the AWS global cloud network.

Türk Telekom Group, Turkey's leading integrated telecommunications company, joined the Bridge Alliance, the largest mobile alliance of the leading mobile operators in the Asia-Pacific region. The Türk Telekom Group is the first company to represent Turkey within the Bridge Alliance, which has a combined customer base of over 700 million customers.

Türk Telekom Group introduced its first smartphone "TT175."


In order to deliver mobile, broadband, fixed voice and TV services through a single channel, the brands Avea, Türk Telekom and TTNET were unified under a single "Türk Telekom" brand.

Taking the first step towards its vision of supporting domestic production in LTE technologies, Türk Telekom became the first operator to place an order for ULAK, the LTE national base station project, developed by Aselsan, Netaş and Türk Telekom's R&D subsidiary Argela, with the support of the Undersecretariat of the Defense Industry.

Türk Telekom was named "Turkey's most valuable telecommunication brand" in 2016 on the "Telecoms 500" list of the world's 500 most valuable telecommunication brands, published annually by Brand Finance.

At the GSM Association Mobile Congress held in Barcelona on February 22-25, cooperation between Türk Telekom and Korea Telecom was announced.

Nokia and Türk Telekom agreed to cooperate to produce "baseband" equipment that emits signals, considered the brain of a base station. Türk Telekom became the first operator to integrate ULAK Turkey's first national LTE base station into its network.

Prior to the transition to LTE on April 1, Türk Telekom's senior management launched GIGA LTE.

Türk Telekom once again made its mark on the Bilişim 500 awards. Türk Telekom ranked first among 500 companies in terms of sales revenue, and also came first at the 17th edition of the Bilişim 500 Survey's "Communication Technologies" ranking. Türk Telekom also garnered the "Telecoms Company Main Category Winner of the Year" and "Internet Services Category Winner of the Year" awards.

Türk Telekom, Turkey's leading communication and entertainment Technology Company introduced its new youth brand Selfy.

Türk Telekom's Board of Directors appointed Paul Doany, a well-known figure in the sector, as CEO as of September 26, 2016.

Türk Telekom became the first Turkish operator to test Narrowband IoT technology on its own network, in collaboration with Nokia.

On December 12, 2016, organizational changes made in order to increase efficiency and effectiveness under the integrated Türk Telekom structure were announced.

Türk Telekom International joined the Sea- Me-We-5 consortium as a full member in 2015, and the cable system started to give service at the end of 2016, linking 17 countries in Asia to Europe over a distance of 20,000 kilometers.


Türk Telekom received a payment service license from the BRSA (Banking Regulation and Supervision Agency) for its subsidiary TT Ödeme Hizmetleri A.Ş. (Payment Services), established to provide new generation payment services to its customers.

As per the Official Gazette dated February 5, 2017, the Council of Ministers decided to transfer the Undersecretariat of the Treasury’s 6.68% stake (5% Group B and 1.68% Group D shares) at Türk Telekom to the Turkish Wealth Fund. The share transfer took place following the decision.

The 5G Center of Excellence, designed by Türk Telekom’s research and development subsidiary Argela, opened in Ankara with the purpose of developing domestic 5G technologies.

The “Brand Finance Telecoms 500” 2017 list was announced at the Mobile World Congress held in Barcelona. Türk Telekom was named “Turkey’s most valuable telecommunications brand” on the Telecoms 500 list for 9 consecutive years.

An internet penetration campaign was launched across Turkey. In order to ensure the campaign to access wider population, Türk Telekom offered its brand new internet package to all internet service providers in Turkey via its wholesales channel.

Kars took its place among smart cities. Türk Telekom has transformed Kars into Smart City, introducing services such as free Wi-Fi, smart traffic management systems, smart lighting, and smart pass systems, city access points (information points), and security cameras.

The international Clear5G project, in which Türk Telekom and its subsidiary Argela are participants, demonstrated success to receive grant underHORIZON 2020, the European Commission’s civilian research and innovation program with the largest budget in the international arena. Türk Telekom became the first Turkish telecommunications operator to participate in an international consortium in the field of 5G and beyond technologies.

Türk Telekom started a new era for its “Türk Telekom Prime” brand, which offers its customers exclusive services. Türk Telekom Prime has based its new brand promise on the concepts of “liberating, comfortable, and creating own space and time”, under the new slogan “Multiply Life with Türk Telekom Prime”. Türk Telekom Prime was relaunched with its new logo.

Two of Turkey’s well-established institutions, Türk Telekom and PTT renewed Pttcell collaboration, and extended their partnership in mobile communications field, launched in 2013, for a further 5 years. Under the agreement, Türk Telekom will continue to provide network and technical infrastructure for the mobile communication services that PTT offers with its “Pttcell” brand, until 2022.

Türk Telekom was selected as the most valuable brand in Turkey once again. In “Turkey’s Most Valuable Brands of Turkey 100” list prepared annually by international brand assessment company Brand Finance, Türk Telekom increasing its brand value by more than 11% to USD 2.6 billion, was selected as the most valuable brand in Turkey.

Avea-Vodafone Evrensel İş Ortaklığı, established by Türk Telekom and Vodafone with its best bid won the tender for delivering mobile communication infrastructure in 1,472 locations with no mobile infrastructure. The project will be carried out within the scope of the Universal Service Fund, under the leadership of the Ministry of Transport, Maritime Affairs and Communication.

Türk Telekom again won the top spot at the 18th year of the Bilişim 500 (IT 500) event. Türk Telekom maintained its leader position among 500 IT companies in terms of sales revenue, winning the 2016 Grand Prize, “Number One in the Turkish IT Sector 2016”. Türk Telekom also won “Number One in the Internet Services Category”, “ Number One in the Telecoms Company Main Category” and “Number One in Communication Technologies” awards.

Türk Telekom launched its platform-based digital keyboard TAMBU, delivered with the vision of fostering domestic and national technologies. As a first in the world, Türk Telekom simultaneously launched the demos for its 5G and Next Generation PON with Nokia.

Türk Telekom has joined forces with General Electric (GE) to accelerate the digital transformation of Turkish industry, and provide the latter with the advantages offered by the Internet of Industrial Things within the scope of the ‘Industry 4.0’ revolution. Türk Telekom and GE Digital via ‘Digital Transformation of Industrial Companies’ business partnership agreement targets, to provide digital transformation consultancy to Turkish industrial corporations, particularly those in the ‘Top 500’ list.

On the night of September 25th at Istanbul’s Harbiye Open Air Theater, Türk Telekom launched its renewed and technologically upgraded digital music platform, Muud.

In an international step supporting the government’s ambition to develop domestic and national technologies, Türk Telekom became a partner member of ONF (Open Networking Foundation), a US-based open platform that includes global technology giants among its members. By participating in the management of ONF, Türk Telekom now has the opportunity to play a pioneering role in 5G and innovative technologies, and introduce software defined networks and virtualization technologies to Turkey.

In Turkey’s telecommunications sector, Türk Telekom became the first company to establish a Corporate Venture Capital (CVC) Company. Türk Telekom announced that, via its CVC company, it would invest in and become a partner to start-ups and/or mid-sized scalable enterprises that has the growth potential and proven business model via extending its own resources to create value from the growth of these companies.

Türk Telekom became a platinum member of the Linux Foundation project Open Network Automation Platform (ONAP), which unites leading global operators and technology providers. Türk Telekom is the only Turkish company to participate in this platform, which develops products and services for the automation, design and management of communication networks and virtual functions. On the platform, Türk Telekom aims to contribute to the development and growth of open source innovation and automation systems on a global scale.

Please add your personal notes These notes are only visible to you.

Your notes on this page





Follow on Twitter