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Area Codes>. Colorado>. Boulder. The city of Boulder is in the state of Colorado. It has the following active area codes: 720.
Colorado currently utilizes 5 area codes. When first established by AT&T and the Bell System in 1947, 303 covered the entire state of Colorado. The most recently added was 983 in 2022 as an overlay to 303. Today, 303 is the most populated with an estimated 2.9 million of the state's 5 million residents.
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 ...
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. Area code 970 serves northern and western Colorado. Area code 748 will be introduced to the northern and western areas of Colorado in 2026.
33.07. * Demographic data is based on information taken from the 2010 Census as is Derived from our ZIP Code Database Products. Lookup area code information for BOULDER, CO. Get the NPA NXX (area code and prefix) as well as much more data for BOULDER, CO.
May 25, 2022 · 303. The 303 is a number synonymous with Denver and Colorado. It was established as Colorado’s area code in 1947. This is the primary area code for the Mile High City, as well as cities like Golden, Boulder, and front range mountain towns to the west like Idaho Springs. You’ll see the numbers 303 along with 5280 (for elevation) used in ...
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this was the first part of North America to have its code changed three times: from 213 to 714 1951: to 619 in 1982, and to 760 in 1997. was to have originally split off the portion of 760 serving San Diego County to a new 442 area code in late 2008/early 2009; that plan was cancelled. 2009: overlaid by 442. 761.
