Area Code 423-243 located in CHATTANOOGA, HAMILTON, TN, more detail is as below. Place NPA (Numbering Plan Area) : 423 NXX (Local Number Prefix) : 243 City : CHATTANOOGA County : HAMILTON State : TN (Tennessee) NXX Use Type : Landline NXX Intro Version : 1997-10-11 FIPS (Federal Information Processing Standards) : 47065 LATA (Local Access Transport Area) : 472 Rate Center : SODDYDAISY ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 37402 Other Information NPANXX : 423243 County Population : 0 Switch CLLI (Common Language Location Identifier) : CHTGTNKVDS0 MSA CBSA (Core Based Statistical Area) : Chattanooga, TN-GA MSA CBSA Code (Core Based Statistical Area) : 16860 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : TELEPORT COMMUNICATIONS AMERICA, LLC - TN OCN (Operating Company Number) : 114F Coverage Area Name : CHATTANOOGA Latitude : 35.0493 Longitude : -85.3070 ‹ previous : 423-243 next › : 423-244 Telephone Number List 423-243-0000 ~ 423-243-9999