Area Code 843-203 located in CHARLESTON, CHARLESTON, SC, more detail is as below. Place NPA (Numbering Plan Area) : 843 NXX (Local Number Prefix) : 203 City : CHARLESTON County : CHARLESTON State : SC (South Carolina) NXX Intro Version : 5/6/2013 Rate Center : CHARLESTON ZIP Code Count : 0 ZIP Code Frequency : 0 Other Information NPANXX : 843203 MSA CBSA (Core Based Statistical Area) : Charleston-North Charleston, SC MSA CBSA Code (Core Based Statistical Area) : 16700 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : QWEST COMMUNICATIONS COMPANY, LLC OCN (Operating Company Number) : 7575 Latitude : None Longitude : None ‹ previous : 843-202 next › : 843-205 Telephone Number List 843-203-0000 ~ 843-203-9999