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Phone Directory 303-858 Detail

State Major City Time Zone
Colorado Denver Mountain

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Example: (303) 858-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
303-858 Denver, CO Qwest Corporation Jefferson Landline 04/01/1997

Other Series For Prefixes

303-8580###
303-8581###
303-8582###
303-8583###
303-8584###
303-8585###
303-8586###
303-8587###
303-8588###
303-8589###