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.

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

Dec 1, 2025 · 303 Area Code located in Colorado, including 26 cities, 10 counties, 1 time zone, map, Census demographics, and 773 active prefixes.

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3 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. Get the …

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

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.

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303: Directed by Hans Weingartner. With Mala Emde, Anton Spieker, Arndt Schwering-Sohnrey, Thomas Schmuckert. Two university students, Jule and Jan, leave Berlin together in an old camper …

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