Area Code 307-685 located in GILLETTE, CAMPBELL, WY, more detail is as below. Place NPA (Numbering Plan Area) : 307 NXX (Local Number Prefix) : 685 City : GILLETTE County : CAMPBELL State : WY (Wyoming) NXX Use Type : Landline NXX Intro Version : 1996-10-15 FIPS (Federal Information Processing Standards) : 56005 LATA (Local Access Transport Area) : 654 Rate Center : GILLETTE ZIP Code Count : 671 ZIP Code Frequency : 41 ZIP Code : 82718 Other Information NPANXX : 307685 County Population : 0 Switch CLLI (Common Language Location Identifier) : GLTTWYMADS0 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 Company : QWEST CORPORATION OCN (Operating Company Number) : 9636 Coverage Area Name : GILLETTE Latitude : 44.2908 Longitude : -105.5027 ‹ previous : 307-684 next › : 307-685 Telephone Number List 307-685-0000 ~ 307-685-9999