Area Code 423-351 located in SWEETWATER, MONROE, TN, more detail is as below. Place NPA (Numbering Plan Area) : 423 NXX (Local Number Prefix) : 351 City : SWEETWATER County : MONROE State : TN (Tennessee) NXX Use Type : Landline NXX Intro Version : 1997-04-01 FIPS (Federal Information Processing Standards) : 47123 LATA (Local Access Transport Area) : 474 Rate Center : SWEETWATER ZIP Code Count : 560 ZIP Code Frequency : 90 ZIP Code : 37874 Other Information NPANXX : 423351 County Population : 0 Switch CLLI (Common Language Location Identifier) : SWTWTNMTDS0 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL OCN (Operating Company Number) : 9419 Coverage Area Name : SWEETWATER Latitude : 35.6048 Longitude : -84.4627 ‹ previous : 423-351 next › : 423-352 Telephone Number List 423-351-0000 ~ 423-351-9999