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Phone Directory 303-231 Detail

State Major City Time Zone
Colorado Denver Mountain

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
303-231 Denver, CO Qwest Corporation Jefferson Landline 02/04/1994

Other Series For Prefixes

303-2310###
303-2311###
303-2312###
303-2313###
303-2314###
303-2315###
303-2316###
303-2317###
303-2318###
303-2319###