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