Area Code 203-684 located in NEW HAVEN, NEW HAVEN, CT, more detail is as below. Place NPA (Numbering Plan Area) : 203 NXX (Local Number Prefix) : 684 City : NEW HAVEN County : NEW HAVEN State : CT (Connecticut) NXX Use Type : Wireless NXX Intro Version : 2000-01-14 FIPS (Federal Information Processing Standards) : 09009 LATA (Local Access Transport Area) : 920 ZIP Code Count : 1 ZIP Code Frequency : 100 ZIP Code : 06430 Other Information NPANXX : 203684 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 Company : METRO PCS, INC. OCN (Operating Company Number) : 5562 Coverage Area Name : NEW HAVEN Latitude : 41.3042 Longitude : -72.9236 ‹ previous : 203-683 next › : 203-685 Telephone Number List 203-684-0000 ~ 203-684-9999