List of Colorado area codes

Map of Colorado area codes in blue (with border states)

The state of Colorado is served by the following area codes:

303/720, which serve Denver and Boulder
719, which serves southeastern Colorado
970, which serves northern and western Colorado

You may click on any area code shown on the map to the left and you will be taken to the page for that area code.

Lists of area codes in the North American Numbering Plan

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