United States of Amercia

Exit Country Code + 1 + Area Code + The Number

The United States country code is s 1. United States is often referred to as US or USA.. The nationality of the United States is American.The capital of United States is Washington, D.C.Largest Cities in United States by population: New York, Los Angeles, Chicago, Houston, Philadelphia, Phoenix, San Antonio, San Diego, Dallas, San Jose. Local Telephone Prefix: 1 is the trunk code for United States