Area Code 475-243 located in ANSONIA, NEW HAVEN, CT, more detail is as below. Place NPA (Numbering Plan Area) : 475 NXX (Local Number Prefix) : 243 City : ANSONIA County : NEW HAVEN State : CT (Connecticut) NXX Use Type : Landline NXX Intro Version : 2/8/2013 FIPS (Federal Information Processing Standards) : 09009 LATA (Local Access Transport Area) : 920 Rate Center : ANSONIDRBY ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 06401 Other Information NPANXX : 475243 County Population : 0 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 Overlay : L Company : PEERLESS NETWORK OF CONNECTICUT, LLC - CT OCN (Operating Company Number) : 539F Coverage Area Name : DERBY Latitude : 41.3242 Longitude : -73.0881 ‹ previous : 475-239 next › : 475-277 Telephone Number List 475-243-0000 ~ 475-243-9999