Area Code 559-204 located in PORTERVILLE, TULARE, CA, more detail is as below. Place NPA (Numbering Plan Area) : 559 NXX (Local Number Prefix) : 204 City : PORTERVILLE County : TULARE State : CA (California) NXX Use Type : Wireless NXX Intro Version : 1998-11-20 FIPS (Federal Information Processing Standards) : 06107 LATA (Local Access Transport Area) : 728 Rate Center : PORTERVL ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 93257 Other Information NPANXX : 559204 County Population : 0 Switch CLLI (Common Language Location Identifier) : FRSNCA011KD MSA CBSA (Core Based Statistical Area) : Visalia-Porterville, CA MSA CBSA Code (Core Based Statistical Area) : 47300 Time Zone : Pacific (GMT -08:00) Observes Daylight Saving Time : Yes Company : AMERICAN MESSAGING SERVICES, LLC OCN (Operating Company Number) : 6906 Coverage Area Name : PORTERVILLE Latitude : 36.0665 Longitude : -119.0186 ‹ previous : 559-203 next › : 559-206 Telephone Number List 559-204-0000 ~ 559-204-9999