Area Code 231-544 located in EAST JORDAN, CHARLEVOIX, MI, more detail is as below. Place NPA (Numbering Plan Area) : 231 NXX (Local Number Prefix) : 544 City : EAST JORDAN County : CHARLEVOIX State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 1999-07-22 FIPS (Federal Information Processing Standards) : 26029 LATA (Local Access Transport Area) : 348 Rate Center : CENTRAL LK ZIP Code Count : 261 ZIP Code Frequency : 15 ZIP Code : 49727 Other Information NPANXX : 231544 County Population : 0 Switch CLLI (Common Language Location Identifier) : CNLKMIXGRS0 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : FRONTIER NORTH, INC. - MI OCN (Operating Company Number) : 0695 Coverage Area Name : CENTRAL LAKE Latitude : 45.0708 Longitude : -85.2670 ‹ previous : 231-543 next › : 231-544 Telephone Number List 231-544-0000 ~ 231-544-9999