Area Code 203-452 located in MONROE, FAIRFIELD, CT, more detail is as below. Place NPA (Numbering Plan Area) : 203 NXX (Local Number Prefix) : 452 City : MONROE County : FAIRFIELD State : CT (Connecticut) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 09001 LATA (Local Access Transport Area) : 920 Rate Center : TRUMBULL ZIP Code Count : 807 ZIP Code Frequency : 39 ZIP Code : 06468 Other Information NPANXX : 203452 County Population : 0 Switch CLLI (Common Language Location Identifier) : TMBLCT00DS0 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 : TRUMBULL Latitude : 41.2626 Longitude : -73.2211 ‹ previous : 203-451 next › : 203-452 Telephone Number List 203-452-0000 ~ 203-452-9999