New Hampshire area codes
New Hampshire has one area code, 603, for all of New Hampshire.
- Area codes
- 1
- Areas
- 1
- Overlay areas
- 0
- Time zone
- Eastern
- ZIP codes
- 281 in New Hampshire
Somewhere in New Hampshire now? What area code am I in? answers from your location.
Every New Hampshire area code
| Code | Where | Overlays | Since |
|---|---|---|---|
| 603 | Manchester, Nashua, Concord | none | 1947 |
New Hampshire area codes by area
Codes that overlay one another share one area. The places listed have a telephone rate centre of their own in NANPA's records, largest first; each links to its ZIP codes.
603 — Manchester
139 places, the largest 36 here (all of them on 603):
- Manchester
- Nashua
- Concord
- Dover
- Rochester
- Salem
- Merrimack
- Bedford
- Keene
- Portsmouth
- Derry
- Laconia
- Lebanon
- Pelham
- Claremont
- Somersworth
- Durham
- Hampton
- Exeter
- Barrington
- Berlin
- Weare
- Tilton
- Milford
- Franklin
- Hollis
- Seabrook
- Hanover
- Plaistow
- Hampstead
- Rindge
- Kingston
- Newmarket
- Suncook
- Chester
- Plymouth
8 counties:
Area codes of the largest cities in New Hampshire
| City | Area codes | Population |
|---|---|---|
| Manchester | 603 | 115,643 |
| Nashua | 603 | 91,294 |
| Concord | 603 | 44,375 |
| Dover | 603 | 33,364 |
| Rochester | 603 | 33,144 |
| Salem | 603 | 30,964 |
| Merrimack | 603 | 28,176 |
| Bedford | 603 | 23,746 |
| Keene | 603 | 22,939 |
| Portsmouth | 603 | 22,545 |
| Derry | 603 | 21,339 |
| Laconia | 603 | 17,085 |
| Windham † | 603 | 16,038 |
| Lebanon | 603 | 14,999 |
| Pelham | 603 | 14,449 |
| Claremont | 603 | 13,078 |
| Londonderry † | 603 | 12,225 |
| Somersworth | 603 | 12,111 |
| Durham | 603 | 10,681 |
| Hampton | 603 | 10,101 |
| Exeter | 603 | 9,964 |
| Barrington | 603 | 9,489 |
| Berlin | 603 | 9,383 |
| Weare | 603 | 9,170 |
| Tilton | 603 | 9,015 |
| Milford | 603 | 8,956 |
| Franklin | 603 | 8,799 |
| Hollis | 603 | 8,603 |
| Litchfield † | 603 | 8,499 |
| Seabrook | 603 | 8,487 |
| Hanover | 603 | 8,479 |
| Bow † | 603 | 8,335 |
| Plaistow | 603 | 7,861 |
| Gilford † | 603 | 7,830 |
| Stratham † | 603 | 7,754 |
| Hudson † | 603 | 7,469 |
| Atkinson † | 603 | 7,267 |
| Sandown † | 603 | 6,628 |
| Swanzey † | 603 | 6,588 |
| Hampstead | 603 | 6,508 |
† NANPA lists no rate centre for the town itself; these are the codes of the nearest one. A town on an area-code boundary can differ from its neighbour.
Questions about New Hampshire area codes
How many area codes does New Hampshire have?
One: 603.
What are the area codes of the largest cities in New Hampshire?
Manchester: 603. Nashua: 603. Concord: 603. Dover: 603. Rochester: 603.
What time zone are New Hampshire area codes in?
Eastern time.
Every US area code · New Hampshire ZIP codes
Source: NANPA NPA database and central office code assignments, 2026-10-10. Places are matched to NANPA's rate centres by name; see sources.
Cite this page
zipcodes.pro. “New Hampshire area codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-codes/nh
Underlying data is public domain or openly licensed — sources, vintages and licences.