Cities in area code 603
Which places use area code 603? 147 rate centers in New Hampshire, the biggest being Manchester, Nashua, Concord. Data below is NANPA's official prefix-to-rate-center mapping.
By numbering footprint the leading localities are Manchester, Nashua, Concord, Derry, Dover, Portsmouth, Merrimack and Salem, and 138 smaller communities down to single-prefix localities. Prefix counts track lines in service, so the ranking is a reasonable proxy for where the code's subscribers actually are.
31 of the localities fall within FCC top-100 metropolitan statistical areas; the rest are smaller communities.
All of the code's territory keeps Eastern time.
Remember that people keep numbers when they relocate, so a 603 number is a where-it-was-issued fact, not a where-they-are fact.
| Locality (rate center) | Active prefixes | Metro area | All codes serving it |
|---|---|---|---|
| Manchester | 80 | Boston-Cambridge-Newton, MA-NH | 603 |
| Nashua | 58 | Boston-Cambridge-Newton, MA-NH | 603 |
| Concord | 39 | — | 603 |
| Derry | 29 | Boston-Cambridge-Newton, MA-NH | 603 |
| Dover | 29 | Boston-Cambridge-Newton, MA-NH | 603 |
| Portsmouth | 28 | Boston-Cambridge-Newton, MA-NH | 603 |
| Merrimack | 23 | — | 603 |
| Salem | 20 | Boston-Cambridge-Newton, MA-NH | 603 |
| Laconia | 19 | — | 603 |
| Keene | 17 | — | 603 |
| Rochester | 16 | Boston-Cambridge-Newton, MA-NH | 603 |
| Exeter | 15 | Boston-Cambridge-Newton, MA-NH | 603 |
| Milford | 11 | — | 603 |
| Plymouth | 10 | — | 603 |
| Suncook | 9 | — | 603 |
| West Lebanon | 8 | — | 603 |
| Hanover | 8 | — | 603 |
| Claremont | 8 | — | 603 |
| Lebanon | 8 | — | 603 |
| Hampton | 8 | Boston-Cambridge-Newton, MA-NH | 603 |
| Plaistow | 7 | Boston-Cambridge-Newton, MA-NH | 603 |
| Durham | 7 | Boston-Cambridge-Newton, MA-NH | 603 |
| Berlin | 6 | — | 603 |
| Littleton | 6 | — | 603 |
| Meredith | 6 | — | 603 |
| Bedford | 6 | — | 603 |
| Peterborough | 6 | — | 603 |
| Raymond | 5 | Boston-Cambridge-Newton, MA-NH | 603 |
| North Conway | 5 | — | 603 |
| Newport | 5 | — | 603 |
| Sunapee | 5 | — | 603 |
| Lancaster | 5 | — | 603 |
| Colebrook | 4 | — | 603 |
| Woodsville | 4 | — | 603 |
| New Boston | 4 | — | 603 |
| Tilton | 4 | — | 603 |
| Center Ossipee | 4 | — | 603 |
| Hampstead | 4 | Boston-Cambridge-Newton, MA-NH | 603 |
| North Woodstock | 4 | — | 603 |
| Goffstown | 4 | — | 603 |
| Conway | 4 | — | 603 |
| Seabrook | 4 | Boston-Cambridge-Newton, MA-NH | 603 |
| Newmarket | 3 | Boston-Cambridge-Newton, MA-NH | 603 |
| Lyme | 3 | — | 603 |
| Bristol | 3 | — | 603 |
| Campton | 3 | — | 603 |
| West Chesterfield | 3 | — | 603 |
| Hollis | 3 | — | 603 |
| South Hampton | 3 | Boston-Cambridge-Newton, MA-NH | 603 |
| Barrington | 3 | Boston-Cambridge-Newton, MA-NH | 603 |
| Canaan | 3 | — | 603 |
| Milan | 3 | — | 603 |
| Tamworth | 3 | — | 603 |
| Kingston | 3 | Boston-Cambridge-Newton, MA-NH | 603 |
| Orford | 3 | — | 603 |
| Candia | 3 | Boston-Cambridge-Newton, MA-NH | 603 |
| Rye Beach | 3 | Boston-Cambridge-Newton, MA-NH | 603 |
| Somersworth | 3 | Boston-Cambridge-Newton, MA-NH | 603 |
| Deerfield | 3 | Boston-Cambridge-Newton, MA-NH | 603 |
| Pelham | 3 | — | 603 |
| Wolfeboro | 3 | Boston-Cambridge-Newton, MA-NH | 603 |
| Jaffrey | 3 | — | 603 |
| Greenfield | 3 | — | 603 |
| Pike | 3 | — | 603 |
| Epping | 3 | Boston-Cambridge-Newton, MA-NH | 603 |
| Danbury | 3 | — | 603 |
| Errol | 2 | — | 603 |
| Winchester | 2 | — | 603 |
| Troy | 2 | — | 603 |
| Center Harbor | 2 | — | 603 |
| Charlestown | 2 | — | 603 |
| Belmont | 2 | — | 603 |
| Center Barnstead | 2 | — | 603 |
| Center Sandwich | 2 | — | 603 |
| Greenville | 2 | — | 603 |
| Bartlett | 2 | — | 603 |
| Chester | 2 | Boston-Cambridge-Newton, MA-NH | 603 |
| Enfield | 2 | — | 603 |
| Milton | 2 | Boston-Cambridge-Newton, MA-NH | 603 |
| Spofford | 2 | — | 603 |
| Gilmanton Iron Works | 2 | — | 603 |
| Ashland | 2 | — | 603 |
| Jackson | 2 | — | 603 |
| Jefferson | 2 | — | 603 |
| Henniker | 2 | — | 603 |
| Warner | 2 | — | 603 |
| Hillsboro | 2 | — | 603 |
| Gorham | 2 | — | 603 |
| Meriden | 2 | — | 603 |
| Washington | 2 | — | 603 |
| Sanbornville | 2 | — | 603 |
| New London | 2 | — | 603 |
| Penacook | 2 | — | 603 |
| Alstead | 2 | — | 603 |
| Antrim | 2 | — | 603 |
| Northwood | 2 | Boston-Cambridge-Newton, MA-NH | 603 |
| Monroe | 2 | — | 603 |
| Salisbury | 2 | — | 603 |
| Franklin | 2 | — | 603 |
| Plainfield | 2 | — | 603 |
| New Durham | 2 | Boston-Cambridge-Newton, MA-NH | 603 |
| Canterbury | 2 | — | 603 |
| Andover | 2 | — | 603 |
| Epsom | 2 | — | 603 |
| Farmington | 2 | Boston-Cambridge-Newton, MA-NH | 603 |
| Walpole | 2 | — | 603 |
| Barnstead | 2 | — | 603 |
| Boscawen | 2 | — | 603 |
| Chichester | 2 | — | 603 |
| Lisbon | 2 | — | 603 |
| Alton | 2 | — | 603 |
| Rindge | 2 | — | 603 |
| Sutton | 2 | — | 603 |
| West Stewartstown | 1 | — | 603 |
| Piermont | 1 | — | 603 |
| Bretton Woods | 1 | — | 603 |
| Hinsdale | 1 | — | 603 |
| Madison | 1 | — | 603 |
| Westmoreland | 1 | — | 603 |
| Pittsfield | 1 | Boston-Cambridge-Newton, MA-NH | 603 |
| North Walpole | 1 | — | 603 |
| Marlow | 1 | — | 603 |
| Milton Mills | 1 | Boston-Cambridge-Newton, MA-NH | 603 |
| Hillsborough Upper Village | 1 | — | 603 |
| Hancock | 1 | — | 603 |
| Weare | 1 | — | 603 |
| Pittsburg | 1 | — | 603 |
| Melvin Village | 1 | — | 603 |
| Dublin | 1 | — | 603 |
| Fitzwilliam | 1 | — | 603 |
| Groveton | 1 | — | 603 |
| Wilton | 1 | — | 603 |
| Chatham | 1 | — | 603 |
| Contoocook | 1 | — | 603 |
| Warren | 1 | — | 603 |
| Dunbarton | 1 | — | 603 |
| Rumney | 1 | — | 603 |
| Franconia | 1 | — | 603 |
| Harrisville | 1 | — | 603 |
| Whitefield | 1 | — | 603 |
| Twin Mountain | 1 | — | 603 |
| Sullivan | 1 | — | 603 |
| Bethlehem | 1 | — | 603 |
| Marlborough | 1 | — | 603 |
| North Stratford | 1 | — | 603 |
| Bradford | 1 | — | 603 |
| East Conway | 1 | — | 603 |
FAQ
What is the biggest city in area code 603?
Manchester holds the most active prefixes (80), making it the code's largest numbering locality.
How many places does 603 cover?
147 rate centers in New Hampshire hold active 603 prefixes, from Manchester down to communities with a single prefix.
Does a 603 number guarantee the caller lives in one of these places?
No — the tables show where number blocks were issued. Porting and VoIP let people keep or acquire numbers anywhere.