Area Code 231-518 located in KALKASKA, KALKASKA, MI, more detail is as below. Place NPA (Numbering Plan Area) : 231 NXX (Local Number Prefix) : 518 City : KALKASKA County : KALKASKA State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 2001-10-31 FIPS (Federal Information Processing Standards) : 26079 LATA (Local Access Transport Area) : 348 Rate Center : KALKASKA ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 49646 Other Information NPANXX : 231518 County Population : 0 Switch CLLI (Common Language Location Identifier) : GDRPMIQLX1Y 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 : LEVEL 3 COMMUNICATIONS, LLC - MI OCN (Operating Company Number) : 6120 Coverage Area Name : KALKASKA Latitude : 44.7334 Longitude : -85.1834 ‹ previous : 231-516 next › : 231-519 Telephone Number List 231-518-0000 ~ 231-518-9999