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Phone Directory 303-666 Detail

State Major City Time Zone
Colorado Denver Mountain

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Example: (303) 666-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
303-666 Denver, CO Qwest Corporation Jefferson Landline 02/04/1994

Other Series For Prefixes

303-6660###
303-6661###
303-6662###
303-6663###
303-6664###
303-6665###
303-6666###
303-6667###
303-6668###
303-6669###