New Hampshire area codes
- Area code in
- 1
- State
- New Hampshire
- New Hampshire is served by a single area code, 603, in service since 1947.
- Updated 8 October 2026
Now in New Hampshire
Eastern Time · UTC−5, UTC−4 in summer
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Eastern Time
Typical business hours, 9 to 5 Monday to Friday.
Typical business hours, 9 to 5 Monday to Friday, shown as the blue arc. A guide to when a real New Hampshire office is likely to answer. It says nothing about who called you.
01
The New Hampshire area code
New Hampshire uses a single area code, 603, and has done since 1947. Every New Hampshire number starts with it.
02
Spam call reports in New Hampshire
These New Hampshire area codes drew the most reports to the FTC in the 30 days to 8 October 2026. The figures describe numbers displaying each code, which caller ID spoofing can fake.
Most reported New Hampshire area codes · last 30 days
| # | Code | Primary city | Reports (30 days) |
|---|---|---|---|
| 1 | 603 | Manchester | 348 |
A number listed here may itself be a spoofing victim rather than the caller. These are unverified consumer reports.
Source: FTC Do Not Call Reported Calls Data, unverified consumer reports, retrieved 8 October 2026. Request a correction. Month-over-month figures appear once two complete 30-day windows exist.
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03
Questions
How many area codes does New Hampshire have?
New Hampshire has 1 area code: 603.
What is the main area code for Manchester?
The main area code for Manchester is 603.
Which New Hampshire area code is oldest?
Area code 603 is the oldest in New Hampshire, in service since 1947.
Do I need to dial ten digits in New Hampshire?
Not necessarily. New Hampshire has no overlay codes, so seven-digit local dialling may still work in parts of the state.
Which New Hampshire area code gets the most spam calls?
Area code 603 (Manchester) drew the most reports of any New Hampshire code in the 30 days to 8 October 2026, with 348 numbers reported.
Neighbouring states
Largest cities