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Phone Directory 720-428 Detail

State Major City Time Zone
Colorado Denver Mountain

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Example: (720) 428-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
720-428 Denver, CO Broadvox-clec Jefferson Landline 12/12/2011

Other Series For Prefixes

720-4280###
720-4281###
720-4282###
720-4283###
720-4284###
720-4285###
720-4286###
720-4287###
720-4288###
720-4289###