Area Code 231-206 located in MUSKEGON, MUSKEGON, MI, more detail is as below. Place NPA (Numbering Plan Area) : 231 NXX (Local Number Prefix) : 206 City : MUSKEGON County : MUSKEGON State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 1999-07-22 FIPS (Federal Information Processing Standards) : 26121 LATA (Local Access Transport Area) : 348 Rate Center : MUSKEGON ZIP Code Count : 2 ZIP Code Frequency : 50 ZIP Code : 49444 Other Information NPANXX : 231206 County Population : 0 Switch CLLI (Common Language Location Identifier) : GDRPMIBLXGX MSA CBSA (Core Based Statistical Area) : Muskegon-Norton Shores, MI MSA CBSA Code (Core Based Statistical Area) : 34740 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 : 231-206 next › : 231-207 Telephone Number List 231-206-0000 ~ 231-206-9999