Portsmouth City Area Code List
| Area Codes |
Country |
State |
City |
Time Zone |
Operating |
| 401 |
US |
Rhode Island – RI |
Portsmouth |
Eastern |
Details |
| 603 |
US |
New Hampshire - NH |
Portsmouth |
Eastern |
Details |
| 712 |
US |
Iowa - IA |
Portsmouth |
Central |
Details |
| 740 |
US |
Ohio - OH |
Portsmouth |
Eastern |
Details |
