Area Code 423-207 located in JOHNSON CITY, WASHINGTON, TN, more detail is as below. Place NPA (Numbering Plan Area) : 423 NXX (Local Number Prefix) : 207 City : JOHNSON CITY County : WASHINGTON State : TN (Tennessee) NXX Use Type : Landline NXX Intro Version : 2001-06-30 FIPS (Federal Information Processing Standards) : 47179 LATA (Local Access Transport Area) : 956 Rate Center : MIDWAY WA ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 37604 Other Information NPANXX : 423207 County Population : 0 Switch CLLI (Common Language Location Identifier) : JHCYTNXCOMD 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 : LEVEL 3 COMMUNICATIONS, LLC - TN OCN (Operating Company Number) : 4806 Coverage Area Name : KINGSPORT Latitude : 36.4504 Longitude : -82.4655 ‹ previous : 423-207 next › : 423-208 Telephone Number List 423-207-0000 ~ 423-207-9999