Area Code 307-238 located in AFTON, LINCOLN, WY, more detail is as below. Place NPA (Numbering Plan Area) : 307 NXX (Local Number Prefix) : 238 City : AFTON County : LINCOLN State : WY (Wyoming) NXX Use Type : Landline NXX Intro Version : 2001-10-31 FIPS (Federal Information Processing Standards) : 56023 Rate Center : AFTON ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 83110 Other Information NPANXX : 307238 County Population : 0 Switch CLLI (Common Language Location Identifier) : JCSNWYBP00A Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Latitude : None Longitude : None ‹ previous : 307-237 next › : 307-239 Telephone Number List 307-238-0000 ~ 307-238-9999