Area Code 423-444 located in LIMESTONE, WASHINGTON, TN, more detail is as below. Place NPA (Numbering Plan Area) : 423 NXX (Local Number Prefix) : 444 City : LIMESTONE County : WASHINGTON State : TN (Tennessee) NXX Use Type : Wireless NXX Intro Version : 1/8/2010 FIPS (Federal Information Processing Standards) : 47179 LATA (Local Access Transport Area) : 956 Rate Center : LIMESTONE ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 37681 Other Information NPANXX : 423444 County Population : 0 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 : CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN OCN (Operating Company Number) : 6673 Coverage Area Name : LIMESTONE Latitude : 36.2256 Longitude : -82.6311 ‹ previous : 423-443 next › : 423-445 Telephone Number List 423-444-0000 ~ 423-444-9999