Browse Colorado area codes and open individual area code pages for location, major cities, time zone, introduction date, overlay or related codes, and dialing information.
About Colorado Area Codes
Area Codes Atlas currently lists 6 published area code pages associated with Colorado. Use the directory above to open each code page and review its location, listed cities, time zone, introduction date, and related or overlay code information. The introduction-year data in the current directory ranges from 1947 to 2025.
Cities Listed for Colorado Area Codes
Cities appearing in the current Colorado area-code records include Loveland, Arvada, Aurora, Boulder, and Brighton. The exact cities vary by area code, so open an individual code page for its full city list.
Frequently Asked Questions About Colorado Area Codes
How many Colorado area codes are listed?
Area Codes Atlas currently has 6 published area code pages associated with Colorado.
Which cities are listed for Colorado area codes?
Current records include cities such as Loveland, Arvada, Aurora, Boulder, Brighton, and Broomfield. City coverage differs by area code, so use the directory above for code-specific details.
How can I find information about a specific Colorado area code?
Select an area code from the directory above. Each code page includes the available location, city, time zone, introduction-date, related-code, and dialing information.
Counts, cities, time zones, and introduction-year summaries on this page are generated from the current published Area Codes Atlas directory and may change as the directory is updated.