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Phone Directory 303-401 Detail

State Major City Time Zone
Colorado Denver Mountain

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Example: (303) 401-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
303-401 Denver, CO Qwest Corporation Jefferson Landline 04/01/1997

Other Series For Prefixes

303-4010###
303-4011###
303-4012###
303-4013###
303-4014###
303-4015###
303-4016###
303-4017###
303-4018###
303-4019###