Area Code 231-837 located in FREMONT, NEWAYGO, MI, more detail is as below. Place NPA (Numbering Plan Area) : 231 NXX (Local Number Prefix) : 837 City : FREMONT County : NEWAYGO State : MI (Michigan) NXX Use Type : Wireless NXX Intro Version : 2000-01-14 FIPS (Federal Information Processing Standards) : 26123 LATA (Local Access Transport Area) : 348 Rate Center : FREMONT ZIP Code Count : 1 ZIP Code Frequency : 100 ZIP Code : 49412 Other Information NPANXX : 231837 County Population : 0 Switch CLLI (Common Language Location Identifier) : GDRPMIBLXGZ MSA CBSA (Core Based Statistical Area) : Grand Rapids-Wyoming, MI MSA CBSA Code (Core Based Statistical Area) : 24340 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : AMERICAN MESSAGING (AM), INC. OCN (Operating Company Number) : 9748 Coverage Area Name : FREMONT Latitude : 43.4678 Longitude : -85.9426 ‹ previous : 231-836 next › : 231-838 Telephone Number List 231-837-0000 ~ 231-837-9999