Area Code 423-456 located in CHARLESTON, BRADLEY, TN, more detail is as below. Place NPA (Numbering Plan Area) : 423 NXX (Local Number Prefix) : 456 City : CHARLESTON County : BRADLEY State : TN (Tennessee) NXX Use Type : Landline NXX Intro Version : 2005-10-13 FIPS (Federal Information Processing Standards) : 47011 Rate Center : CHARLESTON ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 37310 Other Information NPANXX : 423456 County Population : 0 Switch CLLI (Common Language Location Identifier) : CHTGTNNSW94 MSA CBSA (Core Based Statistical Area) : Cleveland, TN MSA CBSA Code (Core Based Statistical Area) : 17420 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Latitude : None Longitude : None ‹ previous : 423-455 next › : 423-457 Telephone Number List 423-456-0000 ~ 423-456-9999