What is the dialling code for the usa?

The international calling code of the use is +1 .To call internationally from the UK, dial 00 followed by the relevant Country Dialling Code .For example, to call a person in the USA with the national telephone number 516 321 1234 ,UK callers should dial as follows:- 001 516 321 1234

The country dialling code for the United States is 1. If you want to call the US from the UK, you need to dial the exit code which is 00, followed by the dialling code, then USA area or city code and lastly the local phone number that you wish to call.

The calling code of the USA is + 1, When calling the United States from the UK: you dial 00, 1, the City Area Code of where you calling e.g. Rolando, new York and then dial the Number you wish to call.

To make a call from USA the required dial code is +1 while to call USA the required dial code is 011. The United States of America refers to a federal constitutional republic comprising fifty states and a federal district. The federal constitutional republic is the third or fourth largest country by total area, and the third largest both by land area and population.