Area Code 307-351 located in DOUGLAS, CONVERSE, WY, more detail is as below. Place NPA (Numbering Plan Area) : 307 NXX (Local Number Prefix) : 351 City : DOUGLAS County : CONVERSE State : WY (Wyoming) NXX Use Type : Wireless NXX Intro Version : 1995-02-11 FIPS (Federal Information Processing Standards) : 56009 LATA (Local Access Transport Area) : 654 Rate Center : DOUGLAS ZIP Code Count : 1 ZIP Code Frequency : 100 ZIP Code : 82633 Other Information NPANXX : 307351 County Population : 0 Switch CLLI (Common Language Location Identifier) : DGLSWY01CM2 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Company : NEW CINGULAR WIRELESS PCS, LLC OCN (Operating Company Number) : 6010 Coverage Area Name : DOUGLAS Latitude : 42.7567 Longitude : -105.5472 ‹ previous : 307-350 next › : 307-352 Telephone Number List 307-351-0000 ~ 307-351-9999