New Hampshire area code: 603 covers the whole state
The New Hampshire area code 603 is the only one in use, and it has served the state since 1947.
- The area code
- 603
- Service began in
- 1947
- The rate centres
- 148
- The time zone
- The Eastern time zone
- Expected exhaust
- 2040
- From another country
- +1 603 plus the 7-digit number
Source: the NANPA area code report, the rate-centre report and the exhaust projections, file dated 11/01/2026. We are not an official NANPA site.
All places within the 603 area code
Local calling areas (rate centres): 148
Woodsville, Wolfeboro, Winchester, Wilton, Whitefield, Westmoreland, West Stewartstown, West Lebanon, West Chesterfield, Weare, Washington, Warren, Warner, Walpole, Twin Mountain, Troy, Tilton, Tamworth, Sutton, Suncook, Sunapee, Sullivan, Spofford, South Hampton, Somersworth, Seabrook, Sanbornville, Salisbury, Salem, Rye Beach, Rumney, Rochester, Rindge, Raymond, Portsmouth, Plymouth, Plaistow, Plainfield, Pittsfield, Pittsburg, Pike, Piermont, Peterborough, Penacook, Pelham, Orford, Northwood, North Woodstock, North Walpole, North Stratford, North Conway, Nhisp, Newport, Newmarket, New London, New Durham, New Boston, Nashua, Monroe, Milton Mills, Milton, Milford, Milan, Merrimack, Meriden, Meredith, Melvin Village, Marlow, Marlborough, Manchester, Madison, Lyme, Littleton, Lisbon, Lebanon, Lancaster, Laconia, Kingston, Keene, Jefferson, Jaffrey, Jackson, Hollis, Hinsdale, Hillsborough Upper Village, Hillsboro, Henniker, Harrisville, Hanover, Hancock, Hampton, Hampstead, Groveton, Greenville, Greenfield, Gorham, Goffstown, Gilmanton Iron Works, Franklin, Franconia, Fitzwilliam, Farmington, Exeter, Errol, Epsom, Epping, Enfield, East Conway, Durham, Dunbarton, Dublin, Dover, Derry, Deerfield, Danbury, Conway, Contoocook, Concord, Colebrook, Claremont, Chichester, Chester, Chatham, Charlestown, Center Sandwich, Center Ossipee, Center Harbor, Center Barnstead, Canterbury, Candia, Canaan, Campton, Bristol, Bretton Woods, Bradford, Boscawen, Bethlehem, Berlin, Belmont, Bedford, Bartlett, Barrington, Barnstead, Ashland, Antrim, Andover, Alton, Alstead.
Where New Hampshire's area code came from
603 dates to 1947, when the first codes were assigned, and NANPA lists no code split away from 603.
Will a new area code come to New Hampshire?
No new code for years, since NANPA forecasts 603 will run out of numbers in 2040.
| NANPA forecast | Forecast exhaust |
|---|---|
| 2026.1 | 2040 4Q |
| 2025.2 | 2037 2Q |
| 2025.1 | 2032 2Q |
| 2024.2 | 2029 3Q |
| 2024.1 | 2027 4Q |
| 2023.2 | 2027 2Q |
Area codes across the New Hampshire state line
Area codes for the states bordering New Hampshire
New Hampshire area code questions
What area code does New Hampshire use?
603 covers the whole state.
How can I get a number for New Hampshire?
You can get a 603 number from any provider that hands out local numbers. Compare first-year costs.
In New Hampshire, for a local call, do I dial the area code?
Yes. Within 603, both local and long-distance calls use 10-digit dialling. Calling from abroad, dial +1 603 first.