Area Code 423-232 located in JONESBOROUGH, WASHINGTON, TN, more detail is as below. Place NPA (Numbering Plan Area) : 423 NXX (Local Number Prefix) : 232 City : JONESBOROUGH County : WASHINGTON State : TN (Tennessee) NXX Use Type : Landline NXX Intro Version : 1996-10-15 FIPS (Federal Information Processing Standards) : 47179 LATA (Local Access Transport Area) : 956 Rate Center : JOHNSON CY ZIP Code Count : 32 ZIP Code Frequency : 2 ZIP Code : 37659 Other Information NPANXX : 423232 County Population : 0 Switch CLLI (Common Language Location Identifier) : JHCYTNXADS0 MSA CBSA (Core Based Statistical Area) : Johnson City, TN MSA CBSA Code (Core Based Statistical Area) : 27740 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : UNITED TELEPHONE-SOUTHEAST-TN DBA CENTURYLINK - TN OCN (Operating Company Number) : 4510 Coverage Area Name : JOHNSON CITY Latitude : 36.3216 Longitude : -82.3549 ‹ previous : 423-232 next › : 423-232 Telephone Number List 423-232-0000 ~ 423-232-9999