Area Code 231-317 located in BOYNE CITY, CHARLEVOIX, MI, more detail is as below. Place NPA (Numbering Plan Area) : 231 NXX (Local Number Prefix) : 317 City : BOYNE CITY County : CHARLEVOIX State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 1999-07-22 FIPS (Federal Information Processing Standards) : 26029 LATA (Local Access Transport Area) : 348 Rate Center : BOYNE CITY ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 49712 Other Information NPANXX : 231317 County Population : 0 Switch CLLI (Common Language Location Identifier) : GDRPMIBHCM0 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : USA MOBILITY WIRELESS, INC. OCN (Operating Company Number) : 6630 Coverage Area Name : BOYNE CITY Latitude : 45.2198 Longitude : -85.0184 ‹ previous : 231-316 next › : 231-318 Telephone Number List 231-317-0000 ~ 231-317-9999