Area Code 423-376 located in MADISONVILLE, MONROE, TN, more detail is as below. Place NPA (Numbering Plan Area) : 423 NXX (Local Number Prefix) : 376 City : MADISONVILLE County : MONROE State : TN (Tennessee) NXX Use Type : Landline NXX Intro Version : 2002-05-01 FIPS (Federal Information Processing Standards) : 47123 LATA (Local Access Transport Area) : 474 Rate Center : MADISONVL ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 37354 Other Information NPANXX : 423376 County Population : 0 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : ALEC, LLC - TN OCN (Operating Company Number) : 2588 Coverage Area Name : MADISONVILLE Latitude : 35.5181 Longitude : -84.3685 ‹ previous : 423-375 next › : 423-377 Telephone Number List 423-376-0000 ~ 423-376-9999