Area Code 508-303 located in MARLBOROUGH, MIDDLESEX, MA, more detail is as below. Place NPA (Numbering Plan Area) : 508 NXX (Local Number Prefix) : 303 City : MARLBOROUGH County : MIDDLESEX State : MA (Massachusetts) NXX Use Type : Landline NXX Intro Version : 1996-07-01 FIPS (Federal Information Processing Standards) : 25017 LATA (Local Access Transport Area) : 128 Rate Center : MARLBORO ZIP Code Count : 1123 ZIP Code Frequency : 83 ZIP Code : 01752 Other Information NPANXX : 508303 Switch CLLI (Common Language Location Identifier) : MRBOMAMADS0 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 Company : VERIZON NEW ENGLAND INC. OCN (Operating Company Number) : 9102 Coverage Area Name : MARLBORO Latitude : 42.3452 Longitude : -71.5411 ‹ previous : 508-303 next › : 508-304 Telephone Number List 508-303-0000 ~ 508-303-9999