Area Code 231-223 located in TRAVERSE CITY, GRAND TRAVERSE, MI, more detail is as below. Place NPA (Numbering Plan Area) : 231 NXX (Local Number Prefix) : 223 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 : OLDMISSION ZIP Code Count : 1059 ZIP Code Frequency : 95 ZIP Code : 49686 Other Information NPANXX : 231223 County Population : 0 Switch CLLI (Common Language Location Identifier) : OLMSMIXIDS0 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 : PENINSULA TELEPHONE CO. OCN (Operating Company Number) : 0720 Coverage Area Name : ELK RAPIDS Latitude : 44.9088 Longitude : -85.5095 ‹ previous : 231-223 next › : 231-224 Telephone Number List 231-223-0000 ~ 231-223-9999