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Phone Directory 303-431 Detail

State Major City Time Zone
Colorado Denver Mountain

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
303-431 Denver, CO Qwest Corporation Jefferson Landline 02/04/1994

Other Series For Prefixes

303-4310###
303-4311###
303-4312###
303-4313###
303-4314###
303-4315###
303-4316###
303-4317###
303-4318###
303-4319###