Area Code 617-819 located in CHELSEA, SUFFOLK, MA, more detail is as below. Place NPA (Numbering Plan Area) : 617 NXX (Local Number Prefix) : 819 City : CHELSEA County : SUFFOLK State : MA (Massachusetts) NXX Use Type : Landline NXX Intro Version : 1996-10-15 FIPS (Federal Information Processing Standards) : 25025 LATA (Local Access Transport Area) : 128 Rate Center : CHELSEA ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 02150 Other Information NPANXX : 617819 Switch CLLI (Common Language Location Identifier) : BSTNMABLDS3 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 : MCIMETRO ACCESS TRANSMISSION SERVICES LLC OCN (Operating Company Number) : 7229 Coverage Area Name : CHELSEA Latitude : 42.3485 Longitude : -71.0841 ‹ previous : 617-818 next › : 617-820 Telephone Number List 617-819-0000 ~ 617-819-9999