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Phone Directory 303-931 Detail

State Major City Time Zone
Colorado Denver Mountain

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Example: (303) 931-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
303-931 Denver, CO T-mobile Usa Jefferson Cell Number 10/15/1996

Other Series For Prefixes

303-9310###
303-9311###
303-9312###
303-9313###
303-9314###
303-9315###
303-9316###
303-9317###
303-9318###
303-9319###