How to dial a phone number in Kolkatta India?
From outside India, a caller would dial their international call prefix (typically 00 in Europe and 011 in North America), followed by 91 (the country code for
India), then 33 the 2-3 digit area code of the place you're calling (Kolkatta) minus the trunk code '0', and finally the local number minus the trunk code '0'. All local telephone numbers dialled within India must use the leading '0' and the area phone code, even when calling locally.
