Area Code 517-238 located in MONTGOMERY, BRANCH, MI, more detail is as below. Place NPA (Numbering Plan Area) : 517 NXX (Local Number Prefix) : 238 City : MONTGOMERY County : BRANCH State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 26023 LATA (Local Access Transport Area) : 348 Rate Center : COLDWTR LK ZIP Code Count : 140 ZIP Code Frequency : 6 ZIP Code : 49255 Other Information NPANXX : 517238 County Population : 0 Switch CLLI (Common Language Location Identifier) : CDWLMIXGRS0 MSA CBSA (Core Based Statistical Area) : Coldwater, MI MSA CBSA Code (Core Based Statistical Area) : 17740 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : FRONTIER NORTH, INC. - MI OCN (Operating Company Number) : 0695 Coverage Area Name : COLDWATER Latitude : 41.8277 Longitude : -84.9891 ‹ previous : 517-237 next › : 517-238 Telephone Number List 517-238-0000 ~ 517-238-9999