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Phone Directory 303-307 Detail

State Major City Time Zone
Colorado Denver Mountain

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Example: (303) 307-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
303-307 Denver, CO Qwest Corporation Denver Landline 05/18/1998

Other Series For Prefixes

303-3070###
303-3071###
303-3072###
303-3073###
303-3074###
303-3075###
303-3076###
303-3077###
303-3078###
303-3079###