Area Code 508-257 located in NANTUCKET, NANTUCKET, MA, more detail is as below. Place NPA (Numbering Plan Area) : 508 NXX (Local Number Prefix) : 257 City : NANTUCKET County : NANTUCKET State : MA (Massachusetts) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 25019 LATA (Local Access Transport Area) : 128 Rate Center : SIASCONSET ZIP Code Count : 578 ZIP Code Frequency : 41 ZIP Code : 02554 Other Information NPANXX : 508257 Switch CLLI (Common Language Location Identifier) : SCNSMABHRS1 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : VERIZON NEW ENGLAND INC. OCN (Operating Company Number) : 9102 Coverage Area Name : NANTUCKET Latitude : 41.2625 Longitude : -69.9692 ‹ previous : 508-256 next › : 508-257 Telephone Number List 508-257-0000 ~ 508-257-9999