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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.
Telephone numbers in area code 678 were first assigned to customers signing up for new telephone service on January 15, 1998. On September 2, 2001, area code 470, was added to the 678 overlay area of area codes 404 and 770. [1] Telephone numbers from the NPA were assigned after exhaustion of area code 678.
1955: split to give New Brunswick its own 506 area code; Newfoundland was added to the service area when it joined Canada in 1949. When 506 was created, Newfoundland was assigned to the new code along with New Brunswick. In 1962, Newfoundland received its own code, 709. 2014: overlaid by 782; 851 reserved as a third area code for the region. 903
Centennial is a home rule municipality located in Arapahoe County, Colorado, United States. [1] The city population was 108,418 at the 2020 United States Census, making Centennial the 11th most populous municipality in Colorado. [3] Centennial is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area and the Front Range ...
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As a result, prefixes were duplicated in both area codes, which counteracted much of the benefit of the division, with only 200 of 700 prefixes in area 612 transferring entirely to area 651. In less than two years, area code 612 again exhausted its supply of telephone numbers, and necessitated a three-way division in 2000, creating the new area ...
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.
The Denver–Aurora–Lakewood, CO Metropolitan Statistical Area; County 2010 Census 2020 Census Change City and County of Denver: 600,158 715,522