Area Code 586-203 located in MOUNT CLEMENS, MACOMB, MI, more detail is as below. Place NPA (Numbering Plan Area) : 586 NXX (Local Number Prefix) : 203 City : MOUNT CLEMENS County : MACOMB State : MI (Michigan) NXX Use Type : Landline NXX Intro Version : 2004-08-17 FIPS (Federal Information Processing Standards) : 26099 LATA (Local Access Transport Area) : 340 Rate Center : MT CLEMENS ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 48043 Other Information NPANXX : 586203 County Population : 0 Switch CLLI (Common Language Location Identifier) : SFLDMIMKDS0 MSA CBSA (Core Based Statistical Area) : Detroit-Warren-Livonia, MI MSA CBSA Code (Core Based Statistical Area) : 19820 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : BROADWING COMMUNICATIONS, LLC - MI OCN (Operating Company Number) : 4088 Coverage Area Name : MOUNT CLEMENS Latitude : 42.5903 Longitude : -82.8826 ‹ previous : 586-202 next › : 586-206 Telephone Number List 586-203-0000 ~ 586-203-9999