Area Code 860-204 located in MONTVILLE, NEW LONDON, CT, more detail is as below. Place NPA (Numbering Plan Area) : 860 NXX (Local Number Prefix) : 204 City : MONTVILLE County : NEW LONDON State : CT (Connecticut) NXX Use Type : Landline NXX Intro Version : 1996-01-10 FIPS (Federal Information Processing Standards) : 09011 LATA (Local Access Transport Area) : 920 Rate Center : NORWICH ZIP Code Count : 11 ZIP Code Frequency : 2 ZIP Code : 06353 Other Information NPANXX : 860204 Switch CLLI (Common Language Location Identifier) : NRWCCT00DS1 MSA CBSA (Core Based Statistical Area) : Norwich-New London, CT MSA CBSA Code (Core Based Statistical Area) : 35980 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 : NORWICH Latitude : 41.5263 Longitude : -72.0775 ‹ previous : 860-204 next › : 860-204 Telephone Number List 860-204-0000 ~ 860-204-9999