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Phone Directory 307-857 Detail

State Major City Time Zone
Wyoming Casper Mountain

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Example: (307) 857-5555 or 2012145555

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Area Code Prefixes

Prefix Primary City Company County Usage Introduced
307-857 Riverton, WY Qwest Corporation Fremont Landline 02/04/1994

Other Series For Prefixes

307-8570###
307-8571###
307-8572###
307-8573###
307-8574###
307-8575###
307-8576###
307-8577###
307-8578###
307-8579###