Area Code 307-358 located in DOUGLAS, CONVERSE, WY, more detail is as below. Place NPA (Numbering Plan Area) : 307 NXX (Local Number Prefix) : 358 City : DOUGLAS County : CONVERSE State : WY (Wyoming) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 56009 LATA (Local Access Transport Area) : 654 Rate Center : DOUGLAS ZIP Code Count : 3180 ZIP Code Frequency : 99 ZIP Code : 82633 Other Information NPANXX : 307358 County Population : 0 Switch CLLI (Common Language Location Identifier) : DGLSWYMADS0 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Company : QWEST CORPORATION OCN (Operating Company Number) : 9636 Coverage Area Name : DOUGLAS Latitude : 42.7597 Longitude : -105.3838 ‹ previous : 307-356 next › : 307-359 Telephone Number List 307-358-0000 ~ 307-358-9999