New Hampshire Dialing Codes, Country Codes and Area Codes
| City | Country Codes | Area Codes | Dialing Codes |
|---|---|---|---|
| Concord | +1 | 603 | +1 603 |
| Derry | +1 | 603 | +1 603 |
| Dover | +1 | 302 | +1 302 |
| Keene | +1 | 603 | +1 603 |
| Laconia | +1 | 603 | +1 603 |
| Manchester | +1 | 603 | +1 603 |
| Nashua | +1 | 603 | +1 603 |
| Portsmouth | +1 | 757 | +1 757 |
| Rochester | +1 | 585 | +1 585 |
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