USA Area Codes

Denver Area Code 303

The city of Denver is one of the most populous cities of the USA and the capital of the state Colorado. The country code of the USA is +1 & the Denver area code is 303. For a local call in Denver you don't have to dial the area code.

If you want to call from New York to Denver you have to dial +1 303 + the number.To call outside the USA you have to dial the country code of the country you want to reach, the local area code and the local telephone number.

Last change: 23.04.2007