Area Code 203-753 located in WATERBURY, NEW HAVEN, CT, more detail is as below. Place NPA (Numbering Plan Area) : 203 NXX (Local Number Prefix) : 753 City : WATERBURY County : NEW HAVEN State : CT (Connecticut) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 09009 LATA (Local Access Transport Area) : 920 Rate Center : WATERBURY ZIP Code Count : 868 ZIP Code Frequency : 29 ZIP Code : 06708 Other Information NPANXX : 203753 County Population : 0 Switch CLLI (Common Language Location Identifier) : WTRBCT00CG0 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 : SOUTHERN NEW ENGLAND TELEPHONE CO. OCN (Operating Company Number) : 9147 Coverage Area Name : WATERBURY Latitude : 41.5522 Longitude : -73.0443 ‹ previous : 203-753 next › : 203-754 Telephone Number List 203-753-0000 ~ 203-753-9999