Area Code 781-274 located in LEXINGTON, MIDDLESEX, MA, more detail is as below. Place NPA (Numbering Plan Area) : 781 NXX (Local Number Prefix) : 274 City : LEXINGTON County : MIDDLESEX State : MA (Massachusetts) NXX Use Type : Landline NXX Intro Version : 1997-10-11 FIPS (Federal Information Processing Standards) : 25017 LATA (Local Access Transport Area) : 128 Rate Center : LEXINGTON ZIP Code Count : 166 ZIP Code Frequency : 17 ZIP Code : 02421 Other Information NPANXX : 781274 Switch CLLI (Common Language Location Identifier) : LXTNMAWADS0 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 : LEXINGTON Latitude : 42.4441 Longitude : -71.2252 ‹ previous : 781-273 next › : 781-274 Telephone Number List 781-274-0000 ~ 781-274-9999