Area Code 203-793 located in WALLINGFORD, NEW HAVEN, CT, more detail is as below. Place NPA (Numbering Plan Area) : 203 NXX (Local Number Prefix) : 793 City : WALLINGFORD County : NEW HAVEN State : CT (Connecticut) NXX Use Type : Landline NXX Intro Version : 2000-08-20 FIPS (Federal Information Processing Standards) : 09009 LATA (Local Access Transport Area) : 920 Rate Center : WALLINGFD ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 06492 Other Information NPANXX : 203793 County Population : 0 Switch CLLI (Common Language Location Identifier) : SMFRCTQIDS0 MSA CBSA (Core Based Statistical Area) : New Haven-Milford, CT MSA CBSA Code (Core Based Statistical Area) : 35300 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : GLOBAL CROSSING LOCAL SERVICES, INC.-CT OCN (Operating Company Number) : 3493 Coverage Area Name : WALLINGFORD Latitude : 41.4539 Longitude : -72.8137 ‹ previous : 203-792 next › : 203-794 Telephone Number List 203-793-0000 ~ 203-793-9999