Area Code 774-320 located in ROCHESTER, PLYMOUTH, MA, more detail is as below. Place NPA (Numbering Plan Area) : 774 NXX (Local Number Prefix) : 320 City : ROCHESTER County : PLYMOUTH State : MA (Massachusetts) NXX Use Type : Wireless NXX Intro Version : 9/4/2009 FIPS (Federal Information Processing Standards) : 25023 LATA (Local Access Transport Area) : 128 Rate Center : ROCHESTER ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 02770 Other Information NPANXX : 774320 MSA CBSA (Core Based Statistical Area) : Boston-Cambridge-Quincy, MA-NH MSA CBSA Code (Core Based Statistical Area) : 14460 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Overlay : L Company : CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA OCN (Operating Company Number) : 6387 Coverage Area Name : ROCHESTER Latitude : 41.7791 Longitude : -70.9058 ‹ previous : 774-319 next › : 774-321 Telephone Number List 774-320-0000 ~ 774-320-9999