Quick Answer

Colorado has 4 active area codes: 303, 719, 720, 970. All Colorado area codes are in the Mountain time zone. Data source: NANPA.

All Area Codes in Colorado

CodeRegionMajor CitiesTimezone
303 Denver Denver, Boulder, Aurora (part) Mountain
719 Southern Colorado Colorado Springs, Pueblo, Canon City Mountain
720 Denver (overlay) Denver, Aurora, Lakewood Mountain
970 Western Colorado Fort Collins, Greeley, Grand Junction Mountain
Ad

Frequently Asked Questions

How many area codes does Colorado have?
Colorado has 4 active area codes: 303, 719, 720, 970.
What are the area codes in Colorado?
The area codes in Colorado are: 303 (Denver), 719 (Southern Colorado), 720 (Denver (overlay)), 970 (Western Colorado).
What area code is Denver?
Denver uses area code 303, located in Denver, Colorado.
What time zone are Colorado area codes in?
All area codes in Colorado are in the Mountain time zone.
Ad

Nearby States