Exit Code – This is the code you need to dial OUT from a country. Also known as IDD (International Direct Dialing) code or ISD (International Subscriber Dialing) code.
Country Code – Each country or region is assigned thier individual country code. You will need this code to dial IN to a country. There is a total of 249 codes worldwide. View all Country Codes
Area Codes – Area codes define a specific part of a country. This can be a whole city or a general region. Some countries are not big enough to have multiple area codes, so you would simply dial the country code and the direct dial number.
Local Number – This number is the local direct line to a home, business or cellphone.
United States and Canada are part of the North American Numbering Plan (NANP). All NANP countries have country code 1. The general procedure for calling a NANP country is 1 + Area code (3 digits) + TEL # (7 digit)
ISD Code or Country Code of United States is 1
Area code – There are 291 area codes in United States. Dial the area code of the city in the United States you are calling after dialing ISD Code. If there is no area code dial the Recipient’s Telephone Number after ISD Code.
United States Emergency Numbers
911 – Police
911 – Ambulance
911 – Fire
311 – Non-Emergecy
#77 – Highway Patrol from mobile