Area Code 303 Colorado, USA

WhereCall is here to provide you with the most information on the area code 303, located in Colorado, USA. This area code contains 800 prefixes and is not in jeopardy of exceeding the known supply of central office codes during the planning/implementation interval for relief.


NPA Information
Area Code (NPA)303
LocationColorado, USA
In Jeopardy?No
Is Assigned?Yes
Assignment Date01 Jan 1947
In Service?Yes
In Service Date01 Jan 1947
OverlayYes
Overlay Complex303/720
Predominant Timezone(s)UTC-07:00
Reverse Phone Lookup »
303 area code map