Area Code 307-457 located in RIVERTON, FREMONT, WY, more detail is as below. Place NPA (Numbering Plan Area) : 307 NXX (Local Number Prefix) : 457 City : RIVERTON County : FREMONT State : WY (Wyoming) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 56013 LATA (Local Access Transport Area) : 654 Rate Center : GAS HILLS ZIP Code Count : 3 ZIP Code Frequency : 100 ZIP Code : 82501 Other Information NPANXX : 307457 County Population : 0 Switch CLLI (Common Language Location Identifier) : GSHLWYXC457 MSA CBSA (Core Based Statistical Area) : Riverton, WY MSA CBSA Code (Core Based Statistical Area) : 40180 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Company : RT COMMUNICATIONS OCN (Operating Company Number) : 3410 Coverage Area Name : JEFFREY CITY Latitude : 42.8113 Longitude : -107.6129 ‹ previous : 307-455 next › : 307-459 Telephone Number List 307-457-0000 ~ 307-457-9999