To call the United States from Costa Rica, you would first dial 001, then the area code, followed by the local phone number. If the number you are attempting to call is 1-222-333-4444, you would dial 001-222-333-4444.
As an alternative, you could use a VOIP service such as Skype through an internet connection to save money. In which case you would be required to set up an account with the service, select the country you are calling and enter the local number.
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