303 Area Code

 

Area code 303 is a central Colorado area code that covers Denver, Boulder and their surrounding areas. Area code 303 overlays the area code of 720.

Colorado has area codes of 303, 719, 720, 970.

Time Zone:Mountain GMT -7:00 with Daylight Saving in the Summer
Assigned Date:01-Jan-47
In Service Date:01-Jan-47

Counties that Use 303 Area Code

Major Cities that Use 303 Area Code

All Cities & Towns that Use 303 Area Code

 

Search other city, zip, or area code



 

Where is 303 area code?

The following map shows the coverage of 303 area code. The coverage area is shown in green.

Area code map of the entire U.S.

 
The USA.com website and domain are privately owned and are not operated by or affiliated with any government or municipal authority.
© 2014 World Media Group, LLC.