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Area Codes in Colorado

Explore area codes connected to ZIP codes in Colorado. Use this page to move between area code lookup, ZIP code coverage, and state-level browsing.

View ZIP codes in Colorado Browse all area codes
State
Colorado
CO
ZIP codes
656
Population
5,119,400
970
Colorado
ZIPs 235
Cities 196
Pop. 1,121,836
303
Colorado
ZIPs 215
Cities 69
Pop. 2,966,221
719
Colorado
ZIPs 206
Cities 134
Pop. 1,031,343

About area codes in Colorado

Area codes in Colorado connect phone numbering geography with ZIP code regions, cities, and local coverage. Use the cards above to open each area code page, then continue to the related ZIP code pages for deeper postal lookup.