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)
UK telephone code misconceptions a one. This change makes about 200,000 new numbers available for each area code in which the change has been made. Some telephone service providers differentiate ordinary calling costs using the relevant area code(s). Until STD was introduced, only telephone operators could connect calls over the trunks (long distance links between major exchanges). A subscriber would have to dial 0 for the operator and then request a long distance call. As STD was introduced area by area the meaning of the 0 changed; it was now the trunk prefix used to raise a call automatically to the trunk dialling level,