Area Code 860-307 located in HARWINTON, LITCHFIELD, CT, more detail is as below. Place NPA (Numbering Plan Area) : 860 NXX (Local Number Prefix) : 307 City : HARWINTON County : LITCHFIELD State : CT (Connecticut) NXX Use Type : Wireless NXX Intro Version : 1996-01-10 FIPS (Federal Information Processing Standards) : 09005 LATA (Local Access Transport Area) : 920 Rate Center : HARWINTON ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 06791 Other Information NPANXX : 860307 Switch CLLI (Common Language Location Identifier) : MRDNCT00CM2 MSA CBSA (Core Based Statistical Area) : Torrington, CT MSA CBSA Code (Core Based Statistical Area) : 45860 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : NEW CINGULAR WIRELESS PCS, LLC - DC OCN (Operating Company Number) : 4036 Coverage Area Name : HARWINTON Latitude : 41.8042 Longitude : -73.1226 ‹ previous : 860-306 next › : 860-308 Telephone Number List 860-307-0000 ~ 860-307-9999