Learn about the history and geography of the telephone area codes for the Denver-Boulder metropolitan area in Colorado. Find out how to dial locally and what is 303 Day. Where is area code 303? Area code 303 is located in central Colorado and covers Denver, Aurora, Lakewood, Thornton, Arvada, Westminster, and Centennial. It has 2 overlays (720 and 983) that serve the same area. Find out the location, time zone, and cities served by area code 303 in Colorado. See the list of phone prefixes, carriers, and usage types for 303 area code. What time zone is 303?The 303 area code lies within the Mountain Daylight Time Zone (or MDT). The current time in Mountain Daylight Time is 06:42 PM on . Did you receive an unwanted call from a (303) phone number?Where is area code 303?Area code 303 is located in central Colorado and covers Denver, Aurora, Lakewood, Thornton, Arvada, Westminster, and Centennial. It has 2 overlays (720 and 983) that serve the same area. What time zone is area code 303? The 303 area code is located in the Mountain timezone. The Mountain time zone is also known as America/Denver.What are area codes 303 720 & 983?Area codes 303, 720, and 983 are telephone area codes in the North American Numbering Plan (NANP) for the north-central portion of the U.S. state of Colorado. The numbering plan area (NPA) comprises Denver and Boulder, as well as their surrounding suburbs, including Lakewood, Littleton, Longmont, Broomfield, Aurora, and Castle Rock.When did area code 303 become area code 970?: Area code 303 was officially put into service, covering the entire state of Colorado. - 1988: Area code 303 was split to form area code 719. - 1995: Area code 303 was split again to form area code 970. - : Area code 720 was introduced as an overlay to area code 303.3 days ago · Area code 303 is located in Colorado. Get area code location and dialing plans for all phone prefixes in area code 303. Learn about the history and geography of the telephone area codes for the Denver-Boulder metropolitan area in Colorado. Find out how to dial locally and what is 303 Day. 5 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 most exact information on time zones here. · Area code 303 is in Colorado, USA , spanning 14 counties and serving 74 cities , including Denver, Aurora or Lakewood; it currently uses 784 prefixes , assigned from 303-200-XXXX through 303-999-XXXX. Area code 303 covers central Colorado, including Denver, Aurora, Boulder, and other cities and counties. Find out the current time, overlays, relieved areas, and valid prefixes for area code 303. Find out the location, time zone, and cities served by area code 303 in Colorado. See the list of phone prefixes, carriers, and usage types for 303 area code. What time zone is 303?The 303 area code lies within the Mountain Daylight Time Zone (or MDT). The current time in Mountain Daylight Time is 06:42 PM on . Did you receive an unwanted call from a (303) phone number?Where is area code 303?Area code 303 is located in central Colorado and covers Denver, Aurora, Lakewood, Thornton, Arvada, Westminster, and Centennial. It has 2 overlays (720 and 983) that serve the same area. What time zone is area code 303? The 303 area code is located in the Mountain timezone. The Mountain time zone is also known as America/Denver.What are area codes 303 720 & 983?Area codes 303, 720, and 983 are telephone area codes in the North American Numbering Plan (NANP) for the north-central portion of the U.S. state of Colorado. The numbering plan area (NPA) comprises Denver and Boulder, as well as their surrounding suburbs, including Lakewood, Littleton, Longmont, Broomfield, Aurora, and Castle Rock.When did area code 303 become area code 970?: Area code 303 was officially put into service, covering the entire state of Colorado. - 1988: Area code 303 was split to form area code 719. - 1995: Area code 303 was split again to form area code 970. - : Area code 720 was introduced as an overlay to area code 303.3 days ago · Area code 303 is located in Colorado. Get area code location and dialing plans for all phone prefixes in area code 303. Learn about the history and geography of the telephone area codes for the Denver-Boulder metropolitan area in Colorado. Find out how to dial locally and what is 303 Day. 5 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 most exact information on time zones here. · Area code 303 is in Colorado, USA , spanning 14 counties and serving 74 cities , including Denver, Aurora or Lakewood; it currently uses 784 prefixes , assigned from 303-200-XXXX through 303-999-XXXX. Area code 303 covers central Colorado, including Denver, Aurora, Boulder, and other cities and counties. Find out the current time, overlays, relieved areas, and valid prefixes for area code 303. 3 days ago · Area code 303 is located in Colorado. Get area code location and dialing plans for all phone prefixes in area code 303. 5 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 most exact information on time zones here. · Area code 303 is in Colorado, USA , spanning 14 counties and serving 74 cities , including Denver, Aurora or Lakewood; it currently uses 784 prefixes , assigned from 303-200-XXXX through 303-999-XXXX. Area code 303 covers central Colorado, including Denver, Aurora, Boulder, and other cities and counties. Find out the current time, overlays, relieved areas, and valid prefixes for area code 303. · Area code 303 is in Colorado, USA , spanning 14 counties and serving 74 cities , including Denver, Aurora or Lakewood; it currently uses 784 prefixes , assigned from 303-200-XXXX through 303-999-XXXX. Area code 303 covers central Colorado, including Denver, Aurora, Boulder, and other cities and counties. Find out the current time, overlays, relieved areas, and valid prefixes for area code 303.
