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Phone Directory 303-603 Detail

State Major City Time Zone
Colorado Denver Mountain

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Example: (303) 603-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
303-603 Denver, CO Qwest Corporation Denver Landline 01/10/1996

Other Series For Prefixes

303-6030###
303-6031###
303-6032###
303-6033###
303-6034###
303-6035###
303-6036###
303-6037###
303-6038###
303-6039###