Area Code 203-463 located in OXFORD, NEW HAVEN, CT, more detail is as below. Place NPA (Numbering Plan Area) : 203 NXX (Local Number Prefix) : 463 City : OXFORD County : NEW HAVEN State : CT (Connecticut) NXX Use Type : Landline NXX Intro Version : 1998-01-25 FIPS (Federal Information Processing Standards) : 09009 LATA (Local Access Transport Area) : 920 Rate Center : SEYMOUR ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 06478 Other Information NPANXX : 203463 County Population : 0 Switch CLLI (Common Language Location Identifier) : HRFRCTCRDS0 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 : TELEPORT COMMUNICATIONS GROUP - NEW YORK - CT OCN (Operating Company Number) : 7143 Coverage Area Name : SEYMOUR Latitude : 41.3968 Longitude : -73.0745 ‹ previous : 203-462 next › : 203-464 Telephone Number List 203-463-0000 ~ 203-463-9999