The International Subscriber Dialing Code (ISD Code) of United States is 1. ISD code is also know as country calling code. United States ISD Code / Country Code : 1 There are 291 area codes in United ...

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 ...

The International Subscriber Dialling Code (ISD Code) of United States is 1. ISD code is also know as country calling code. Exit code or access code of a country is the code which is necessary to make ...