Area Code 707-200 located in SAINT HELENA, NAPA, CA, more detail is as below. Place NPA (Numbering Plan Area) : 707 NXX (Local Number Prefix) : 200 City : SAINT HELENA County : NAPA State : CA (California) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 06055 LATA (Local Access Transport Area) : 722 Rate Center : ST HELENA ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 94574 Other Information NPANXX : 707200 Switch CLLI (Common Language Location Identifier) : OKLDCA03DS6 MSA CBSA (Core Based Statistical Area) : Napa, CA MSA CBSA Code (Core Based Statistical Area) : 34900 Time Zone : Pacific (GMT -08:00) Observes Daylight Saving Time : Yes Company : TELEPORT COMMUNICATIONS GROUP - SAN FRANCISCO OCN (Operating Company Number) : 7145 Coverage Area Name : SAINT HELENA Latitude : 38.4978 Longitude : -122.4678 ‹ previous : 706-999 next › : 707-201 Telephone Number List 707-200-0000 ~ 707-200-9999