| District of New Hampshire area codes: 603 | |
|---|---|
| Country | United States |
| State/Province | New Hampshire |
| Major City | Manchester |
| Time Zone | Eastern (UTC-05:00) |
| Prefix | County | Primary City | Company |
|---|---|---|---|
| 603-986 | Carroll | North Conway, NH | Bell Atlantic Nynex Mobile |
| 603-988 | Rockingham | Portsmouth, NH | Sprint Spectrum L.p. |
| 603-989 | Grafton | Woodsville, NH | No New England Tel Op DBA Fairpoint Comm |
| 603-991 | Grafton | Littleton, NH | Bell Atlantic Nynex Mobile |
| 603-992 | Grafton | Grafton, NH | Level 3 Communications |
| 603-994 | Strafford | Rochester, NH | Freedom Ring Communications |
| 603-995 | Merrimack | Henniker, NH | Sprint Spectrum L.p. |
| 603-996 | Grafton | Plymouth, NH | Sprint Spectrum L.p. |
| 603-997 | Rockingham | Hampton, NH | Sprint Spectrum L.p. |
| 603-998 | Belknap | Laconia, NH | Sprint Spectrum L.p. |
| 603-555 | Used in movie | Newmarket, NH | Used in movie |
There are 691 prefixes, In the code area, the major cities are Concord, NH;Derry, NH;Dover, NH;Keene, NH;Manchest. The major city is Manchester.