| General Information about Area Code 603 | |
|---|---|
| Country | United States |
| State / Province / Territory | New Hampshire |
| Major City | Manchester |
| Time Zone | Eastern (UTC-05:00) |
| Prefix | Primary City | County | Phone Type |
|---|---|---|---|
| 603-896 | Salem | Rockingham | Landline |
| 603-992 | Andover | Merrimack | Landline |
| 603-676 | Hanover | Grafton | Landline |
| 603-528 | Gilford | Belknap | Landline |
| 603-862 | Durham | Strafford | Landline |
| 603-459 | Nashua | Hillsborough | Landline |
| 603-905 | Barrington | Strafford | Landline |
| 603-601 | Hampton | Rockingham | Landline |
| 603-645 | Manchester | Hillsborough | Landline |
| 603-466 | Gorham | Coos | Landline |
| 603-567 | Peterborough | Hillsborough | Landline |
| 603-793 | Exeter | Rockingham | Wireless |
| 603-771 | Manchester | Hillsborough | Wireless |
| 603-525 | Hancock | Hillsborough | Landline |
| 603-321 | Nashua | Hillsborough | Wireless |
| 603-937 | Meredith | Belknap | Wireless |
| 603-218 | Manchester | Hillsborough | Landline |
| 603-259 | Littleton | Grafton | Landline |
| 603-598 | Nashua | Hillsborough | Landline |
| 603-783 | Canterbury | Merrimack | Landline |