Area Code 423-389 located in KINGSPORT, SULLIVAN, TN, more detail is as below. Place NPA (Numbering Plan Area) : 423 NXX (Local Number Prefix) : 389 City : KINGSPORT County : SULLIVAN State : TN (Tennessee) NXX Use Type : Wireless NXX Intro Version : 2002-10-25 FIPS (Federal Information Processing Standards) : 47163 LATA (Local Access Transport Area) : 956 Rate Center : MIDWAY SUL ZIP Code Count : 0 ZIP Code Frequency : Second most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 37664 Other Information NPANXX : 423389 County Population : 0 Switch CLLI (Common Language Location Identifier) : MDWYTNABCM1 MSA CBSA (Core Based Statistical Area) : Kingsport-Bristol-Bristol, TN-VA MSA CBSA Code (Core Based Statistical Area) : 28700 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN OCN (Operating Company Number) : 6673 Coverage Area Name : KINGSPORT Latitude : 36.4528 Longitude : -82.4704 ‹ previous : 423-388 next › : 423-389 Telephone Number List 423-389-0000 ~ 423-389-9999