Boulder, Colorado Area Code
Area code for Boulder, Colorado, United States (found 2 items): 303 • 720 • Click on number to see if there are other places in our database with same area code.
International calling code for United States is: 1
How to Dial?
|Calling from||Calling to||Dialing example|
|Abroad*||Boulder, Colorado||+1 303 [Local number]**|
|United States***||Boulder, Colorado||(1+)303 [Local number]|
|United States||Abroad||011 [Country Code] [Area Code] [Local number]|
Local time in Boulder, Colorado (in moment when this page is generated):
Monday, 2018-04-23, 18:55 Difference to Greenwich time (GMT) in hours: -06:00 (MDT time zone).
*Some countries have different international call prefix. Find Your country on our site for more details.
**Many phones have international call prefix list, but they show only a plus sign (+).
***Dialing from United States but outside of area code mentioned