Area Code 978-594 located in SALEM, ESSEX, MA, more detail is as below. Place NPA (Numbering Plan Area) : 978 NXX (Local Number Prefix) : 594 City : SALEM County : ESSEX State : MA (Massachusetts) NXX Use Type : Landline NXX Intro Version : 2001-06-30 FIPS (Federal Information Processing Standards) : 25009 LATA (Local Access Transport Area) : 128 Rate Center : SALEM ZIP Code Count : 14 ZIP Code Frequency : 100 ZIP Code : 01970 Other Information NPANXX : 978594 Switch CLLI (Common Language Location Identifier) : NDHMMAEFDS0 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 : COMCAST PHONE OF MASSACHUSETTS, INC. - MA OCN (Operating Company Number) : 6101 Coverage Area Name : SALEM Latitude : 42.5170 Longitude : -70.8949 ‹ previous : 978-593 next › : 978-595 Telephone Number List 978-594-0000 ~ 978-594-9999