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Colorado area codes, country 1, phone prefixes, call Colorado from another country: 1st international code, 2nd country number, 3rd area code. More indicative of country areas for calls are: zone code, city code and intercity code for national calls.

Country Abbreviation: US – CO


International calls:

00 1 (area code) (7 landline numbers)

  • International Code: 00 (from Europe and most countries) with some exceptions ; or 0011 (from Australia).

  • Country code: 1

  • Colorado area codes: There are 3 numbers. Fixed numbers are displayed as (x). They identify each region, territory or province of the country where we call.

How to call from COLORADO area codes TO ANOTHER COUNTRY; the structure would be like this:

011 (prefix of the destination country) (area code) (landline numbers)

011 (country code of destination) (mobile or cell phone numbers)


For example, if I want to call ARVADA there are 2 options:

00 1 303 xxx xxxx / 0011 1 303 xxx xxxx (from Australia)

00 1 720 xxx xxxx / 0011 1 720 xxx xxxx (from Australia)

Colorado area codes to Call landlines area code between cities (National):

– FROM ANOTHER LANDLINE OR CELL PHONE:  1 (area code) (7 landline numbers)

Example, call DENVER from COLORADO SPRINGS:  1 303 xxx xxxx / 1 720 xxx xxxx

Example, call COLORADO SPRINGS from DENVER:  1 719 xxx xxxx

Colorado area codes to Call landlines area code within the same city (Local):

– FROM ANOTHER LANDLINE OR CELL PHONE:  (area code) (7 landline numbers)

Example, call in DENVER:  303 xxx xxxx / 720 xxx xxxx

Example, call in COLORADO SPRINGS:  719 xxx xxxx

Here’s a list of Colorado Area Codes:

ARVADA (303) or (720)ASPEN (970)AURORA (303) or (720)
BOULDER (303) or (720)COLORADO SPRINGS (719)DENVER (303) or (720)
GREELEY (970)HIGHLANDS RANCH (303) or (720)LAKEWOOD (303) or (720)
LONGMONT (303) or (720)LOVELAND (970)PUEBLO (719)
TRINIDAD (719)WESTMINSTER (303) or (720)

If it is a cell phone, it would be the same way since they include the local prefixes, that is, the 3 numbers of the area code of each city.

CALL CELL PHONE (Composed of 10 numbers):

International calls:

(xxx) Is the area code:

00 1 (xxx) xxx xxxx / 0011 1 (xxx) xxx xxxx (from Australia)

Call cell phone area code between cities (National):

– FROM ANOTHER CELL PHONE OR LANDLINE:  (area code) (cell phone number)

Example, call ARVADA from COLORADO SPRINGS:  1 303 xxx xxxx / 1 720 xxx xxxx

Call cell phone area code within the same city (Local):

– FROM ANOTHER CELL PHONE OR LANDLINE:  (area code) (cell phone number)

Example, call in ARVADA:  303 xxx xxxx / 720 xxx xxxx


(xxx) Is the area code:

+1 (xxx) xxx xxxx 


The three-digit numbers can only be dialed within the country:

POLICE: 911 

DOCTOR: 911 or 311

FIRE: 911 or 311


Yellow Pages

White Pages

UNVEILING COLORADO – Intriguing Tourism Tidbits:

Did you know that Colorado is home to the highest paved road in North America, the breathtaking Trail Ridge Road, which winds through Rocky Mountain National Park?

Explore the vibrant city of Denver, where art, culture, and outdoor adventure converge. Discover the historic Larimer Square, explore world-class museums like the Denver Art Museum, and savor culinary delights in diverse neighborhoods.

Marvel at the majestic beauty of the Rocky Mountains, where outdoor enthusiasts can hike, ski, and mountain bike in stunning surroundings. Visit iconic destinations like Aspen, Vail, and Breckenridge for world-class skiing and snowboarding.

Embark on a scenic drive along the Million Dollar Highway, winding through the rugged San Juan Mountains and offering awe-inspiring views at every turn.

Discover the geological wonders of Garden of the Gods in Colorado Springs, where towering red rock formations create a stunning natural playground for hiking, rock climbing, and photography.

For a glimpse into the state’s mining history, explore the historic town of Leadville, once a booming mining town and now a charming mountain community nestled among the peaks.

Whether you’re seeking adrenaline-pumping adventures or peaceful moments in nature, Colorado offers an endless array of experiences to captivate and inspire.