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Phone Directory 303-421 Detail

State Major City Time Zone
Colorado Denver Mountain

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Example: (303) 421-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
303-421 Denver, CO Qwest Corporation Jefferson Landline 02/04/1994

Other Series For Prefixes

303-4210###
303-4211###
303-4212###
303-4213###
303-4214###
303-4215###
303-4216###
303-4217###
303-4218###
303-4219###