Area Code 203-921 located in STAMFORD, FAIRFIELD, CT, more detail is as below. Place NPA (Numbering Plan Area) : 203 NXX (Local Number Prefix) : 921 City : STAMFORD County : FAIRFIELD State : CT (Connecticut) NXX Use Type : Landline NXX Intro Version : 1994-09-11 FIPS (Federal Information Processing Standards) : 09001 LATA (Local Access Transport Area) : 920 Rate Center : STAMFORD ZIP Code Count : 57 ZIP Code Frequency : 14 ZIP Code : 06901 Other Information NPANXX : 203921 County Population : 0 Switch CLLI (Common Language Location Identifier) : SMFRCT01DS0 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 : 41.0528 Longitude : -73.5361 ‹ previous : 203-920 next › : 203-921 Telephone Number List 203-921-0000 ~ 203-921-9999