Area Code 603-594 located in HUDSON, HILLSBOROUGH, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 594 City : HUDSON County : HILLSBOROUGH State : NH (New Hampshire) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 33011 LATA (Local Access Transport Area) : 122 Rate Center : NASHUA ZIP Code Count : 275 ZIP Code Frequency : 20 ZIP Code : 03051 Other Information NPANXX : 603594 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 : 603-593 next › : 603-594 Telephone Number List 603-594-0000 ~ 603-594-9999