Every country has its own ISD code, for example the ISD code of USA is +1, ie., to make an international call to United States, the number 1 has to dialed followed by the area code and finally the ...
An Internet top-level domain assigned to a country. A country code is a two-letter suffix such as .us (United States), .ca (Canada) and .de (Germany). For a list of codes, see country codes A-E ...