Area Code 231-318 located in TRAVERSE CITY, GRAND TRAVERSE, MI, more detail is as below. Place NPA (Numbering Plan Area) : 231 NXX (Local Number Prefix) : 318 City : TRAVERSE CITY County : GRAND TRAVERSE State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 1999-07-22 FIPS (Federal Information Processing Standards) : 26055 LATA (Local Access Transport Area) : 348 Rate Center : TRAVERSECY ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 49684 Other Information NPANXX : 231318 County Population : 0 Switch CLLI (Common Language Location Identifier) : GDRPMIBHCM0 MSA CBSA (Core Based Statistical Area) : Traverse City, MI MSA CBSA Code (Core Based Statistical Area) : 45900 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : USA MOBILITY WIRELESS, INC. OCN (Operating Company Number) : 6630 Coverage Area Name : TRAVERSE CITY Latitude : 44.7682 Longitude : -85.6085 ‹ previous : 231-317 next › : 231-319 Telephone Number List 231-318-0000 ~ 231-318-9999