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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.
Clickable map of Colorado area codes in blue (with bordering states). ...
The northeastern and western portions of area code 303, including Fort Collins, Grand Junction, Vail and Aspen, were separated on April 2, 1995, and became area code 970. This split reduced 303 to the Denver-Boulder area. [3] With the 1995 split, 303 was the only Colorado area code that did not border another state.
Bailey is an unincorporated community and U.S. Post Office in northeastern Park County, Colorado, United States. Bailey's Post Office ZIP Code is 80421. [4] The town community consists of several small businesses, restaurants and churches. The North Fork South Platte River flows through Bailey.
The map to the right is now clickable; click on an area code to go to the page for that code, or use the text links below. Map of Colorado area codes in blue (with border states) Pages in category "Area codes in Colorado"
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 ...
In March 2011, central office code relief was implemented by adding area code 531 in an overlay to the same service area of 402. Although the first central office prefix in 531 was not assigned until February 2013, ten-digit dialing has been mandatory for all calls from the 402 territory since Spring 2011.
In 1861, David Millspaw became the first permanent settler in the area of what was to become Aurora. Hamilton County was formed in 1870. [4] Aurora was laid out as a town in 1871 by David Stone who named it after his former hometown of Aurora, Illinois. [5] [6] The county seat was transferred from Orville City (an extinct town) to Aurora in ...