603 Area Code

The 603 area code is found in the state of New Hampshire, and spans 10 different Counties. Listed below are the 10 Counties that reside inside of the 603 area code. Included under the Counties are the cities within the given County.
Belknap County New Hampshire
Alton, Alton Bay, Barnstead, Belmont, Center Barnstead, Center Harbor, Gilford, Gilmanton, Gilmanton Iron Works, Laconia, Lochmere, Meredith, New Hampton, Sanbornton, Tilton, Winnisquam
Carroll County New Hampshire
Bartlett, Center Conway, Center Ossipee, Center Sandwich, Center Tuftonboro, Chocorua, Conway, East Wakefield, Eaton Center, Freedom, Glen, Intervale, Jackson, Kearsarge, Madison, Melvin Village, Mirror Lake, Moultonborough, North Conway, North Sandwich, Ossipee, Sanbornville, Silver Lake, South Tamworth, Tamworth, Union, West Ossipee, Wolfeboro, Wolfeboro Falls, Wonalancet
Cheshire County New Hampshire
Alstead, Ashuelot, Chesterfield, Drewsville, Dublin, Fitzwilliam, Gilsum, Harrisville, Hinsdale, Jaffrey, Keene, Marlborough, Marlow, Nelson, North Walpole, Rindge, Spofford, Stoddard, Sullivan, Swanzey, Troy, Walpole, West Chesterfield, West Swanzey, Westmoreland, Winchester
Coos County New Hampshire
Berlin, Bretton Woods, Colebrook, Errol, Gorham, Groveton, Jefferson, Lancaster, Milan, Mount Washington, North Stratford, Pittsburg, Randolph, Twin Mountain, West Stewartstown, Whitefield
Grafton County New Hampshire
Ashland, Bath, Bethlehem, Bristol, Campton, Canaan, Enfield, Enfield Center, Etna, Franconia, Glencliff, Grafton, Hanover, Haverhill, Hebron, Holderness, Lebanon, Lincoln, Lisbon, Littleton, Lyme, Lyme Center, Monroe, North Haverhill, North Woodstock, Orford, Piermont, Pike, Plymouth, Rumney, Stinson Lake, Sugar Hill, Thornton, Warren, Waterville Valley, Wentworth, West Lebanon, Woodstock, Woodsville
Hillsborough County New Hampshire
Amherst, Antrim, Bedford, Bennington, Brookline, Francestown, Goffstown, Greenfield, Greenville, Hancock, Hillsborough, Hollis, Hudson, Litchfield, Lyndeborough, Manchester, Merrimack, Milford, Mont Vernon, Nashua, New Boston, New Ipswich, Pelham, Peterborough, Temple, Weare, West Peterborough, Wilton
Merrimack County New Hampshire
Andover, Bow, Bradford, Canterbury, Chichester, Concord, Contoocook, Danbury, Dunbarton, East Andover, Elkins, Epsom, Franklin, Henniker, Hill, Hooksett, Loudon, New London, Newbury, North Sutton, Pittsfield, Salisbury, South Newbury, South Sutton, Suncook, Warner, Wilmot
Rockingham County New Hampshire
Atkinson, Auburn, Candia, Chester, Danville, Deerfield, Derry, East Candia, East Derry, East Hampstead, East Kingston, Epping, Exeter, Fremont, Greenland, Hampstead, Hampton, Hampton Falls, Kingston, Londonderry, New Castle, Newfields, Newmarket, Newton, Newton Junction, North Hampton, North Salem, Northwood, Nottingham, Plaistow, Portsmouth, Raymond, Rye, Rye Beach, Salem, Sandown, Seabrook, Stratham, West Nottingham, Windham
Strafford County New Hampshire
Barrington, Center Strafford, Dover, Durham, Farmington, Lee, Madbury, Milton, Milton Mills, New Durham, Newington, Rochester, Rollinsford, Somersworth, Strafford
Sullivan County New Hampshire
Acworth, Charlestown, Claremont, Cornish, Cornish Flat, Georges Mills, Goshen, Grantham, Guild, Lempster, Meriden, Newport, Plainfield, South Acworth, Springfield, Sunapee, Washington