Colorado Phone Numbers
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The 303 area code serves Colorado, the majority of the Denver metro area, and the mountain region of the state.
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# 719 Area Code Summary 719 covers southern Colorado, including Colorado Springs, Pueblo, and the Arkansas Valley region.
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The 720 area code serves Denver, Boulder and other cities, towns and unincorporated areas of Colorado. It was created in 1998 and overlays 303 and 303 area codes.
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970 is the area code for Colorado's western slope, including cities such as Grand Junction and Durango.
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983 is an area code in Colorado. It includes parts of Larimer, Weld, and Boulder Counties.