State
Area Code 603
Manchester, Nashua, Concord, New Hampshire
Local time now
…
Time zone
Eastern
Main cities
Manchester, Nashua, Concord, Derry, Dover, Portsmouth
Overlays
None
In service since
1947
When you can make sales calls to 603 numbers
| Every day | 8 AM – 9 PM (federal rule) |
In the called person's local time. Guidance, not legal advice.
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Other area codes in New Hampshire
Questions about area code 603
- Where is area code 603?
- Area code 603 is in New Hampshire, covering Manchester, Nashua, Concord, Derry.
- What time zone is area code 603?
- Eastern time.
- When can telemarketers call a 603 number?
- Federal rules allow sales calls from 8 AM to 9 PM local time.
- Is 603 a toll-free number?
- No. 603 is a regular area code for New Hampshire. Toll-free codes are 800, 833, 844, 855, 866, 877 and 888.