Colorado Area Codes List | Find the Right Code Fast

Looking for Colorado area codes? View a complete list of Colorado phone area codes in an easy-to-search format. Find the right code fast with Sigma Voice.

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Explore Area Codes in Neighboring Regions

Arizona Area Codes

Discover the area codes used in Arizona. Learn about regions and cities served.

Kansas Area Codes

Discover the area codes used in Kansas. Learn about regions and cities served.

Nebraska Area Codes

Discover the area codes used in Nebraska. Learn about regions and cities served.

New Mexico Area Codes

Discover the area codes used in New Mexico. Learn about regions and cities served.

Oklahoma Area Codes

Discover the area codes used in Oklahoma. Learn about regions and cities served.

Utah Area Codes

Discover the area codes used in Utah. Learn about regions and cities served.

Wyoming Area Codes

Discover the area codes used in Wyoming. Learn about regions and cities served.

All Area Codes

The North American Numbering Plan (NANP) is a telephone numbering plan for twenty-five regions in twenty countries primarily in North America, including the United States, Canada, and many Caribbean nations. Below is a comprehensive list of all area codes within the NANP regions.

For a complete list of all area codes, please visit All Area Codes.

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