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Area codes 303, 720 and 983 are telephone area codes in the North American Numbering Plan for the north-central portion of the U.S. state of Colorado. 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 assigned to the entire state when the first nationwide telephone numbering plan was created in 1947. Today it only serves the greater Denver Metropolitan Area. Area codes 720 and 983 are overlay codes for today's 303 numbering plan area (NPA). Area code 719 serves Colorado Springs and southeastern Colorado.
Map of Colorado area codes in blue (with border states) Pages in category "Area codes in Colorado" ... Area codes 303, 720, and 983; Area code 719; Area code 970
Clickable map of Colorado area codes in blue (with bordering states). ...
2023: returned to the pool of area codes available for future area code relief; 457: Louisiana (Shreveport–Bossier City, Monroe, Alexandria, Fisher, Tallulah, and most of northern Louisiana) September 25, 2025 [3] to be overlaid on 318; previously a fictitious area code assigned to identify Naked DSL/Dry Loop and dedicated data lines in ...
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Allenspark is an unincorporated town, a post office, and a census-designated place (CDP) located in and governed by Boulder County, Colorado, United States. The CDP is a part of the Boulder, CO Metropolitan Statistical Area. The Allenspark post office has the ZIP code 80510. [5]
Originally known as Daileyville after James Dailey, a local mine manager, the inhabitants soon changed the name to Silver Creek after the local stream [3] that flows into Clear Creek near Lawson. [2] The town was first settled around 1875 when silver ore deposits [4] were discovered in the area; however, it was not officially incorporated until ...