The international dialing code of the country is United States 1.
Calls are initiated by dialing these code to call United States from other countries.
We’ve listed all the dialing codes for United States in table below are the dialing codes of the regions and cellular operators in United States.
If you received an unknown incoming phone call from United States, you can determine who called you. Using the tables below, you can find out from which region or which mobile network the call was made.
If you are in the country of United States, then for calls to another country simply dial your prefix of international direct dialing, dial country code and national telephone number.
Use our form to find out the international direct dialing (IDD) prefix and the code destination country.