Area Code 203-609 located in DARIEN, FAIRFIELD, CT, more detail is as below. Place NPA (Numbering Plan Area) : 203 NXX (Local Number Prefix) : 609 City : DARIEN County : FAIRFIELD State : CT (Connecticut) NXX Use Type : Landline NXX Intro Version : 1996-01-10 FIPS (Federal Information Processing Standards) : 09001 LATA (Local Access Transport Area) : 920 Rate Center : STAMFORD ZIP Code Count : 1 ZIP Code Frequency : 2 ZIP Code : 06820 Other Information NPANXX : 203609 County Population : 0 Switch CLLI (Common Language Location Identifier) : SMFRCT02DS0 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 : SOUTHERN NEW ENGLAND TELEPHONE CO. OCN (Operating Company Number) : 9147 Coverage Area Name : STAMFORD Latitude : 41.1003 Longitude : -73.5490 ‹ previous : 203-609 next › : 203-609 Telephone Number List 203-609-0000 ~ 203-609-9999