Area Code 423-233 located in JOHNSON CITY, WASHINGTON, TN, more detail is as below. Place NPA (Numbering Plan Area) : 423 NXX (Local Number Prefix) : 233 City : JOHNSON CITY County : WASHINGTON State : TN (Tennessee) NXX Use Type : Landline NXX Intro Version : 1997-10-11 FIPS (Federal Information Processing Standards) : 47179 LATA (Local Access Transport Area) : 956 Rate Center : JOHNSON CY ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 37604 Other Information NPANXX : 423233 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 : PRO PAGE PARTNERS, LLC OCN (Operating Company Number) : 6880 Coverage Area Name : JOHNSON CITY Latitude : 36.3216 Longitude : -82.3549 ‹ previous : 423-233 next › : 423-234 Telephone Number List 423-233-0000 ~ 423-233-9999