Area Code 231-355 located in FREMONT, NEWAYGO, MI, more detail is as below. Place NPA (Numbering Plan Area) : 231 NXX (Local Number Prefix) : 355 City : FREMONT County : NEWAYGO State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 2001-03-03 FIPS (Federal Information Processing Standards) : 26123 LATA (Local Access Transport Area) : 348 Rate Center : FREMONT ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 49412 Other Information NPANXX : 231355 County Population : 0 Switch CLLI (Common Language Location Identifier) : GDRQMIFOCA0 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 : TELNET WORLDWIDE, INC. OCN (Operating Company Number) : 4632 Coverage Area Name : FREMONT Latitude : 43.4678 Longitude : -85.9426 ‹ previous : 231-354 next › : 231-356 Telephone Number List 231-355-0000 ~ 231-355-9999