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
Location Colorado, USA
In Jeopardy? No
Is Assigned? Yes
Assignment Date 01 Jan 1947
In Service? Yes
In Service Date 01 Jan 1947
Overlay Yes
Overlay Complex 303/720
Predominant Timezone(s) UTC-07:00
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