Area Code 231-861 located in ROTHBURY, OCEANA, MI, more detail is as below. Place NPA (Numbering Plan Area) : 231 NXX (Local Number Prefix) : 861 City : ROTHBURY County : OCEANA State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 1999-07-22 FIPS (Federal Information Processing Standards) : 26127 LATA (Local Access Transport Area) : 348 Rate Center : SHELBY ZIP Code Count : 279 ZIP Code Frequency : 8 ZIP Code : 49452 Other Information NPANXX : 231861 County Population : 0 Switch CLLI (Common Language Location Identifier) : SHLBMIXGRS0 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : FRONTIER NORTH, INC. - MI OCN (Operating Company Number) : 0695 Coverage Area Name : SHELBY Latitude : 43.6130 Longitude : -86.3652 ‹ previous : 231-861 next › : 231-861 Telephone Number List 231-861-0000 ~ 231-861-9999