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)
Telephone numbering plan can now be displayed as: as opposed to before September 21, 2002: Some countries already switched, but trunk prefix re-added with the closed dialing plan, for example in Bangkok, Thailand before 1997: has been switched in 1997: Trunk prefix has re-added in 2001 The E.164 standard of the International Telecommunications Union is an international numbering plan and establishes a country calling code ("country code") for each member organization. Country codes are prefixes to national telephone numbers that denote call routing to the network of a subordinate number plan administration, typically a country, or group of countries with a uniform numbering