Area Code 603-577 located in NASHUA, HILLSBOROUGH, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 577 City : NASHUA County : HILLSBOROUGH State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 1994-09-11 FIPS (Federal Information Processing Standards) : 33011 LATA (Local Access Transport Area) : 122 Rate Center : NASHUA ZIP Code Count : 74 ZIP Code Frequency : 13 ZIP Code : 03062 Other Information NPANXX : 603577 County Population : 0 Switch CLLI (Common Language Location Identifier) : NASHNHWPDS1 MSA CBSA (Core Based Statistical Area) : Manchester-Nashua, NH MSA CBSA Code (Core Based Statistical Area) : 31700 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : NO NEW ENGLAND TEL OP DBA FAIRPOINT COMM - NH OCN (Operating Company Number) : 5113 Coverage Area Name : NASHUA Latitude : 42.7575 Longitude : -71.4674 ‹ previous : 603-577 next › : 603-577 Telephone Number List 603-577-0000 ~ 603-577-9999