Area Codes Phone Directory 307-439

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State	Major City	Time Zone
Wyoming	Casper	Mountain

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Example: (307) 439-5555 or 2012145555

Prefix	Primary City	Company	County	Usage	Introduced
307-439	Casper, WY	Advanced Communications Technology	Natrona	Landline	06/15/2006

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307-4390###

307-4391###

307-4392###

307-4393###

307-4394###

307-4395###

307-4396###

307-4397###

307-4398###

307-4399###