Area Code 231-674 located in GRANT, NEWAYGO, MI, more detail is as below. Place NPA (Numbering Plan Area) : 231 NXX (Local Number Prefix) : 674 City : GRANT County : NEWAYGO State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 2001-10-31 FIPS (Federal Information Processing Standards) : 26123 LATA (Local Access Transport Area) : 348 Rate Center : GRANT ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 49327 Other Information NPANXX : 231674 County Population : 0 Switch CLLI (Common Language Location Identifier) : GDRPMIQLDS0 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 : LEVEL 3 COMMUNICATIONS, LLC - MI OCN (Operating Company Number) : 6120 Coverage Area Name : GRANT Latitude : 43.3334 Longitude : -85.8082 ‹ previous : 231-672 next › : 231-675 Telephone Number List 231-674-0000 ~ 231-674-9999