Area Code 203-290 located in GREENWICH, FAIRFIELD, CT, more detail is as below. Place NPA (Numbering Plan Area) : 203 NXX (Local Number Prefix) : 290 City : GREENWICH County : FAIRFIELD State : CT (Connecticut) NXX Use Type : Landline NXX Intro Version : 2000-08-20 FIPS (Federal Information Processing Standards) : 09001 LATA (Local Access Transport Area) : 132 Rate Center : GREENWICH ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 06831 Other Information NPANXX : 203290 County Population : 0 Switch CLLI (Common Language Location Identifier) : NYCNNYDBDS5 MSA CBSA (Core Based Statistical Area) : Bridgeport-Stamford-Norwalk, CT MSA CBSA Code (Core Based Statistical Area) : 14860 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : GLOBAL NAPS, INC. - RI OCN (Operating Company Number) : 4357 Coverage Area Name : GREENWICH Latitude : 41.0242 Longitude : -73.6264 ‹ previous : 203-289 next › : 203-291 Telephone Number List 203-290-0000 ~ 203-290-9999