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Phone Directory 303-300 Detail

State Major City Time Zone
Colorado Denver Mountain

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
303-300 Denver, CO Qwest Corporation Denver Landline 11/20/1998

Other Series For Prefixes

303-3000###
303-3001###
303-3002###
303-3003###
303-3004###
303-3005###
303-3006###
303-3007###
303-3008###
303-3009###