Area Code 203-837 located in DANBURY, FAIRFIELD, CT, more detail is as below. Place NPA (Numbering Plan Area) : 203 NXX (Local Number Prefix) : 837 City : DANBURY County : FAIRFIELD State : CT (Connecticut) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 09001 LATA (Local Access Transport Area) : 920 Rate Center : DANBURY ZIP Code Count : 6 ZIP Code Frequency : 100 ZIP Code : 06810 Other Information NPANXX : 203837 County Population : 0 Switch CLLI (Common Language Location Identifier) : DNBRCT00DS1 MSA CBSA (Core Based Statistical Area) : Bridgeport-Stamford-Norwalk, CT MSA CBSA Code (Core Based Statistical Area) : 14860 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 : DANBURY Latitude : 41.3956 Longitude : -73.4537 ‹ previous : 203-836 next › : 203-838 Telephone Number List 203-837-0000 ~ 203-837-9999