Area Code 508-209 located in WALTHAM, MIDDLESEX, MA, more detail is as below. Place NPA (Numbering Plan Area) : 508 NXX (Local Number Prefix) : 209 City : WALTHAM County : MIDDLESEX State : MA (Massachusetts) NXX Use Type : Landline NXX Intro Version : 2000-01-14 FIPS (Federal Information Processing Standards) : 25017 LATA (Local Access Transport Area) : 128 Rate Center : PLYMOUTH ZIP Code Count : 1 ZIP Code Frequency : 11 ZIP Code : 02453 Other Information NPANXX : 508209 Switch CLLI (Common Language Location Identifier) : MNMTMAMARS1 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 : PLYMOUTH Latitude : 41.9141 Longitude : -70.5566 ‹ previous : 508-208 next › : 508-209 Telephone Number List 508-209-0000 ~ 508-209-9999