Area Code 231-614 located in SHELBY, OCEANA, MI, more detail is as below. Place NPA (Numbering Plan Area) : 231 NXX (Local Number Prefix) : 614 City : SHELBY County : OCEANA State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 2002-02-13 FIPS (Federal Information Processing Standards) : 26127 LATA (Local Access Transport Area) : 348 Rate Center : PENTWATER ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 49455 Other Information NPANXX : 231614 County Population : 0 Switch CLLI (Common Language Location Identifier) : GDRPMIIV1MD Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : LUCRE, INC. OCN (Operating Company Number) : 2518 Coverage Area Name : SHELBY Latitude : 43.6090 Longitude : -86.3683 ‹ previous : 231-613 next › : 231-615 Telephone Number List 231-614-0000 ~ 231-614-9999