Area Code 336-421 located in YANCEYVILLE, CASWELL, NC, more detail is as below. Place NPA (Numbering Plan Area) : 336 NXX (Local Number Prefix) : 421 City : YANCEYVILLE County : CASWELL State : NC (North Carolina) NXX Use Type : Landline NXX Intro Version : 1998-01-25 FIPS (Federal Information Processing Standards) : 37033 LATA (Local Access Transport Area) : 424 Rate Center : ANDERSON ZIP Code Count : 208 ZIP Code Frequency : 11 ZIP Code : 27379 Other Information NPANXX : 336421 County Population : 0 Switch CLLI (Common Language Location Identifier) : ARSNNCMARS0 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL OCN (Operating Company Number) : 9417 Coverage Area Name : PROSPECT HILL Latitude : 36.2673 Longitude : -79.3446 ‹ previous : 336-421 next › : 336-421 Telephone Number List 336-421-0000 ~ 336-421-9999