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1. www.wirefly.com › area-codes › coloradoBoulder, CO Area Codes: List, Map, and Phone Lookup | Wirefly

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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.

2. en.wikipedia.org › wiki › List_of_Colorado_area_codesList of Colorado area codes - Wikipedia

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   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.

3. www.allareacodes.com › colorado_area_codesColorado area codes - Map, list, and phone lookup

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   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 .

4. www.area-codes.com › city › cityArea Codes for BOULDER, CO

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   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.

5. en.wikipedia.org › wiki › Area_codes_303,_720,_and_983Area codes 303, 720, and 983 - Wikipedia

   en.wikipedia.org › wiki › Area_codes_303,_720,_and_983

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   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 ...

6. www.uncovercolorado.com › colorado-area-codesColorado’s 5 Local Area Codes - Uncover Colorado

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   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 ...

7. People also ask

   How many ZIP codes are in Boulder County Colorado?

   • Boulder County, Colorado has 81 zip codes in our database. The county makes up approximately 4.80% of the total land area for Colorado. You can see details of these 81 zip codes below, including land area information for each.

   List of 81 Zip Codes in Boulder County, Colorado

   namecensus.com/zip-codes/colorado/boulder-county/

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   How many area codes are there in Colorado?

   • 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. 720 is an overlay for area code 303.

   Colorado area codes - Map, list, and phone lookup

   www.allareacodes.com/colorado_area_codes.htm

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   What is the 303 area code in Colorado?

   • This code originally served all of Colorado until 1995 when it became necessary to add a second code due to population growth and increased demand for phone lines. The 303 area code serves Denver, Boulder, Aurora, Golden, Lakewood, Littleton, Englewood and other cities and towns throughout the state.

   Area Codes in Colorado – 303, 720, and 719 - State Travel Guides

   www.statetravelguides.com/area-codes-in-colorado/

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   When did Colorado become a numbering plan area?

   • It was one of the first 86 original numbering plan areas (NPAs) created in 1947 when AT&T introduced direct distance dialing to every major city in America. This code originally served all of Colorado until 1995 when it became necessary to add a second code due to population growth and increased demand for phone lines.

   Area Codes in Colorado – 303, 720, and 719 - State Travel Guides

   www.statetravelguides.com/area-codes-in-colorado/

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   When will area code 748 be introduced in Colorado?

   • Area code 748 will be introduced to the northern and western areas of Colorado in 2026. ^ "Area Codes Map, Colorado". NANPA.

   List of Colorado area codes - Wikipedia

   en.wikipedia.org/wiki/List_of_Colorado_area_codes

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   What area code is Mile High 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 businesses and names across the metro.

   Colorado’s 4 Local Area Codes (and upcoming 5th) - Uncover Colorado

   www.uncovercolorado.com/colorado-area-codes/

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8. www.statetravelguides.com › area-codes-in-coloradoArea Codes in Colorado – 303, 720, and 719

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   The 303 area code serves Denver, Boulder, Aurora, Golden, Lakewood, Littleton, Englewood and other cities and towns throughout the state. The 303 area code has been split twice since its inception in order to accommodate population growth. In 1988 it was split with parts going to 719 and 970; then again in 1995 when 720 was added to serve areas ...