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Clickable map of Colorado area codes in blue (with bordering states). [1] The U.S. state of Colorado is served by five telephone area codes of the North American Numbering Plan (NANP). Area code 303 is the original area code assigned to the entire state when the first nationwide telephone numbering plan was created in 1947.
The numbering plan area comprises Denver and Boulder, as well as their surrounding suburbs, including Lakewood, Littleton, Longmont, Broomfield, Aurora, and Castle Rock. Area code 303 is the original area code, while area codes 720 and 983 were added (in 1998 and 2022 respectively) to form an overlay complex for the area, meaning that the same ...
801 CO Denver South: 802 CO* Denver Main: 803 CO Boulder: 804 CO Golden: 805 CO Longmont: ... All three ZIP codes under the 994 range are located in Asotin County ...
That list also includes the county websites, links to Colorado Department of Transportation county maps, and the geographic coordinates of the counties. As of July 1, 2023, El Paso County remains the most populous county in Colorado with a population estimate of 744,215, while Hinsdale County with a 2023 population of 765 is now the least populous.
Post office Current county ZIP Code Date opened Date closed Abarr: Yuma: 80759 Feb 26, 1923 Nov 30, 1947 Abbey [a]: Pueblo: May 29, 1891 Dec 31, 1914
The City of Castle Pines is a home rule municipality located in Douglas County, Colorado, United States. [ 1] The city population was 11,036 at the 2020 United States Census. [ 5] Castle Pines is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area and the Front Range Urban Corridor.
The City of Westminster is a home rule municipality located in Adams and Jefferson counties, Colorado, United States. [ 1] The city population was 116,317 at the 2020 United States Census with 71,240 residing in Adams County and 45,077 residing in Jefferson County. [ 3] Westminster is the eighth most populous city in Colorado.
Website. City Website. Lamar is the home rule municipality that is the county seat and the most populous municipality of Prowers County, Colorado. [ 9] The city population was 7,687 at the 2020 United States Census. [ 7] The city was named after L.Q.C. Lamar, a slaveholder, Confederate soldier and diplomat who wrote the Mississippi Secession ...