Area Code 781-266 located in LEXINGTON, MIDDLESEX, MA, more detail is as below. Place NPA (Numbering Plan Area) : 781 NXX (Local Number Prefix) : 266 City : LEXINGTON County : MIDDLESEX State : MA (Massachusetts) NXX Use Type : Landline NXX Intro Version : 1998-11-20 FIPS (Federal Information Processing Standards) : 25017 LATA (Local Access Transport Area) : 128 Rate Center : LEXINGTON ZIP Code Count : 1 ZIP Code Frequency : 33 ZIP Code : 02420 Other Information NPANXX : 781266 Switch CLLI (Common Language Location Identifier) : CMBRMA01DS5 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 : TELEPORT COMMUNICATIONS GROUP - BOSTON OCN (Operating Company Number) : 7135 Coverage Area Name : BOSTON Latitude : 42.3540 Longitude : -71.0540 ‹ previous : 781-265 next › : 781-266 Telephone Number List 781-266-0000 ~ 781-266-9999