Area Code 231-578 located in SPRING LAKE, OTTAWA, MI, more detail is as below. Place NPA (Numbering Plan Area) : 231 NXX (Local Number Prefix) : 578 City : SPRING LAKE County : OTTAWA State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 1999-07-22 FIPS (Federal Information Processing Standards) : 26139 LATA (Local Access Transport Area) : 348 Rate Center : MUSKEGON ZIP Code Count : 1 ZIP Code Frequency : 100 ZIP Code : 49456 Other Information NPANXX : 231578 County Population : 0 Switch CLLI (Common Language Location Identifier) : GDRPMIBLXGX MSA CBSA (Core Based Statistical Area) : Holland-Grand Haven, MI MSA CBSA Code (Core Based Statistical Area) : 26100 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : SPRINT SPECTRUM L.P. OCN (Operating Company Number) : 6664 Coverage Area Name : MUSKEGON Latitude : 43.2362 Longitude : -86.2433 ‹ previous : 231-577 next › : 231-580 Telephone Number List 231-578-0000 ~ 231-578-9999