Area code 303 was one of the original North American area codes of 1947, and originally served the entire state of Colorado. It remained the state's sole area code for 40 years.

4 days ago · 303 Area Code located in Colorado, including 26 cities, 10 counties, 1 time zone, map, Census demographics, and 773 active prefixes.

Browse area code 303 phone numbers, prefixes and exchanges. The 303 area code serves Denver, Englewood, Aurora, Westminster, Boulder, covering 67 ZIP codes in 14 counties.

2 days ago · 303 is an area code located in the state of Colorado, US. The largest city it serves is Denver. Find out where 303 area code zone from, which states, counties and cities it covers. …

About area code 303: location, common spam callers, related area codes, and more. Includes 303 reverse phone lookup to identify spam callers.

Find 303 area code details including city, time zone, and map. Lookup area code 303 phone number, name, and location.

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Area Code 303 Boundary Map List of ZIP Codes in Area Code 303 ... List of Counties in Area Code 303 ... List of Major Cities/Towns in Area Code 303

1 day ago · Free Search of area code 303 and mobile numbers, how to call Colorado, USA, zip codes, local time.

Area code 303 is located in central Colorado and covers Denver, Aurora, Lakewood, Thornton, Arvada, Westminster, and Centennial. It has a single overlay (720) that serves the same area. …