Area Code 423-913 located in TELFORD, WASHINGTON, TN, more detail is as below. Place NPA (Numbering Plan Area) : 423 NXX (Local Number Prefix) : 913 City : TELFORD County : WASHINGTON State : TN (Tennessee) NXX Use Type : Landline NXX Intro Version : 1996-01-10 FIPS (Federal Information Processing Standards) : 47179 LATA (Local Access Transport Area) : 956 Rate Center : JONESBORO ZIP Code Count : 74 ZIP Code Frequency : 8 ZIP Code : 37690 Other Information NPANXX : 423913 County Population : 0 Switch CLLI (Common Language Location Identifier) : JNBOTNXARS0 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 : JONESBORO Latitude : 36.2894 Longitude : -82.4976 ‹ previous : 423-912 next › : 423-913 Telephone Number List 423-913-0000 ~ 423-913-9999