Area Code 231-938 located in WILLIAMSBURG, GRAND TRAVERSE, MI, more detail is as below. Place NPA (Numbering Plan Area) : 231 NXX (Local Number Prefix) : 938 City : WILLIAMSBURG 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 : 1328 ZIP Code Frequency : 54 ZIP Code : 49690 Other Information NPANXX : 231938 County Population : 0 Switch CLLI (Common Language Location Identifier) : ACMEMIMNDS0 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 : AMERITECH MICHIGAN OCN (Operating Company Number) : 9323 Coverage Area Name : TRAVERSE CITY Latitude : 44.7763 Longitude : -85.4972 ‹ previous : 231-938 next › : 231-941 Telephone Number List 231-938-0000 ~ 231-938-9999