Telephone numbers in Turkey former area codes other than the primary one mentioned. The country calling code of Turkey is 90. trunk / inner - city code number : 0 international code : 00 Ankara DMS-300 Istanbul DMS-300 İzmir DMS-300 Ankara, İstanbul and İzmir DMS-300 International Exchanges Accept: L/D + area code + subscriber number + ST L /D = language digit : 0 (direct dialing) L /D = language digit : 2 (operator assistance) There are two international operator centers in Turkey, Ankara and İstanbul. Each one of these centers provides operator telephone services according ITU/T dialing: L/D + code11 + ST (Random)
Speed calling Speed calling Speed calling service allows telephone subscribers to assign one or two digit speed calling codes, by dialing a change speed calling list access code, a feature code, and a new telephone number. Thereafter, the subscribers need only use the assigned speed code to reach the desired party rather than dial the long phone number. This service became commonplace in the 1970s with the spread of Stored Program Control exchanges capable of implementing the required databases. It remains useful in installations of many extensions where programming each telephone set would be arduous. Speed calling subscriptions have largely been replaced