Area Code 603-398 located in GILSUM, CHESHIRE, NH, more detail is as below. Place NPA (Numbering Plan Area) : 603 NXX (Local Number Prefix) : 398 City : GILSUM County : CHESHIRE State : NH (New Hampshire) NXX Use Type : Wireless NXX Intro Version : 1996-01-10 FIPS (Federal Information Processing Standards) : 33005 LATA (Local Access Transport Area) : 122 Rate Center : W LEBANON ZIP Code Count : 1 ZIP Code Frequency : 33 ZIP Code : 03448 Other Information NPANXX : 603398 County Population : 0 Switch CLLI (Common Language Location Identifier) : MRMCNHGICM0 MSA CBSA (Core Based Statistical Area) : Keene, NH MSA CBSA Code (Core Based Statistical Area) : 28300 Time Zone : Eastern (GMT -05:00) Observes Daylight Saving Time : Yes Company : UNITED STATES CELLULAR CORP. - NEW HAMPSHIRE OCN (Operating Company Number) : 6290 Coverage Area Name : W LEBANON Latitude : 43.6489 Longitude : -72.3111 ‹ previous : 603-398 next › : 603-398 Telephone Number List 603-398-0000 ~ 603-398-9999