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Phone Directory 307-757 Detail

State Major City Time Zone
Wyoming Casper Mountain

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Example: (307) 757-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
307-757 Cheyenne, WY AT&T Local Laramie Landline 07/22/1999

Other Series For Prefixes

307-7570###
307-7571###
307-7572###
307-7573###
307-7574###
307-7575###
307-7576###
307-7577###
307-7578###
307-7579###