Area Code 978-558 located in BOLTON, WORCESTER, MA, more detail is as below. Place NPA (Numbering Plan Area) : 978 NXX (Local Number Prefix) : 558 City : BOLTON County : WORCESTER State : MA (Massachusetts) NXX Use Type : Landline NXX Intro Version : 1998-11-20 FIPS (Federal Information Processing Standards) : 25027 LATA (Local Access Transport Area) : 128 Rate Center : BOLTON ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 01740 Other Information NPANXX : 978558 Switch CLLI (Common Language Location Identifier) : SBTNMAFHDSG MSA CBSA (Core Based Statistical Area) : Worcester, MA MSA CBSA Code (Core Based Statistical Area) : 49340 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : RCN TELECOM SERVICES, INC. - MA OCN (Operating Company Number) : 7619 Coverage Area Name : BOLTON Latitude : 42.4361 Longitude : -71.6161 ‹ previous : 978-557 next › : 978-559 Telephone Number List 978-558-0000 ~ 978-558-9999