Area Code 307-445 located in GILLETTE, CAMPBELL, WY, more detail is as below. Place NPA (Numbering Plan Area) : 307 NXX (Local Number Prefix) : 445 City : GILLETTE County : CAMPBELL State : WY (Wyoming) NXX Use Type : Landline NXX Intro Version : 2001-10-31 FIPS (Federal Information Processing Standards) : 56005 Rate Center : GILLETTE ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 82718 Other Information NPANXX : 307445 County Population : 0 Switch CLLI (Common Language Location Identifier) : CSPRWYDH00A MSA CBSA (Core Based Statistical Area) : Gillette, WY MSA CBSA Code (Core Based Statistical Area) : 23940 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Latitude : None Longitude : None ‹ previous : 307-444 next › : 307-448 Telephone Number List 307-445-0000 ~ 307-445-9999