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Phone Directory 303-999 Detail

State Major City Time Zone
Colorado Denver Mountain

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Example: (303) 999-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
303-999 Denver, CO Comcast Phone Of Colorado Jefferson Landline 08/24/2007

Other Series For Prefixes

303-9990###
303-9991###
303-9992###
303-9993###
303-9994###
303-9995###
303-9996###
303-9997###
303-9998###
303-9999###