603 area code
Area code 603 is in New Hampshire, including Manchester, Nashua, Portsmouth and Dover. It's on Eastern Time.
Eastern Time
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Is it a good time to call 603?
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Business hours are taken as 9 AM to 5 PM on weekdays. US telemarketing rules only allow sales calls between 8 AM and 9 PM local time.
Cities in area code 603
| City | Time zone |
|---|---|
| Manchester, NH | Eastern Time |
| Nashua, NH | Eastern Time |
| Portsmouth, NH | Eastern Time |
| Dover, NH | Eastern Time |
| Salem, NH | Eastern Time |
| Keene, NH | Eastern Time |
| Exeter, NH | Eastern Time |
| Laconia, NH | Eastern Time |
| Concord, NH | Eastern Time |
| Merrimack, NH | Eastern Time |
| Rochester, NH | Eastern Time |
| Lebanon, NH | Eastern Time |
More: look up another area code · time zone converter · US time zones map
Questions people ask
Where is area code 603?
Area code 603 is in New Hampshire, including Manchester, Nashua, Portsmouth and Dover.
What time zone is area code 603?
603 is on Eastern Time (UTC−5, UTC−4 in summer).
What time is it in area code 603 right now?
The live clock at the top of this page shows the current local time in area code 603.