Denver County · Colorado
Denver, CO area codes and time zone
Quick answer
Denver is served by area codes 303, 720, keeps MST time (GMT-6), and sits in county FIPS 08031.
- Area codes
- 303 · 720Within 25 miles of the city centre
- Time zone
- MSTAmerica/Denver
- UTC offset
- GMT-6MDT in summer
- County FIPS
- 08031Denver County
Dialling from and to Denver
What this means when you pick up the phone.
Because more than one code covers this area, ten-digit dialling applies for local calls: area code plus number, every time. From abroad, dial +1 then the ten digits.
More on Denver
Other reference data for this city.