| Area Code 603 Details | |
|---|---|
| Country | United States |
| State/Province | New Hampshire |
| Major City | Manchester |
| Time Zone | Eastern (UTC-05:00) |
| Prefix | County | Phone Type | Status |
|---|---|---|---|
| 603-978 | Strafford | Cell Number | Active |
| 603-986 | Carroll | Cell Number | Active |
| 603-988 | Rockingham | Landline | Active |
| 603-989 | Grafton | Landline | Active |
| 603-991 | Grafton | Cell Number | Active |
| 603-992 | Grafton | Landline | Active |
| 603-994 | Strafford | Landline | Active |
| 603-995 | Merrimack | Cell Number | Active |
| 603-996 | Grafton | Cell Number | Active |
| 603-997 | Rockingham | Cell Number | Active |
| 603-998 | Belknap | Cell Number | Active |