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Phone Directory 307-778 Detail

State Major City Time Zone
Wyoming Casper Mountain

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Example: (307) 778-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
307-778 Cheyenne, WY Qwest Corporation Laramie Landline 02/04/1994

Other Series For Prefixes

307-7780###
307-7781###
307-7782###
307-7783###
307-7784###
307-7785###
307-7786###
307-7787###
307-7788###
307-7789###