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Phone Directory 307-257 Detail

State Major City Time Zone
Wyoming Casper Mountain

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
307-257 Gillette, WY Level 3 Communications Campbell Landline 05/19/2004

Other Series For Prefixes

307-2570###
307-2571###
307-2572###
307-2573###
307-2574###
307-2575###
307-2576###
307-2577###
307-2578###
307-2579###