New Hampshire area codes
New Hampshire has used a single area code, 603, since 1947. Every New Hampshire number starts with it, so the code tells you the state and nothing more specific.
Updated 28 July 2026
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.
New Hampshire area code map
New Hampshire sits in the Eastern Time zone.
Spam call reports in New Hampshire
These New Hampshire area codes drew the most reports to the FTC in the 30 days to 28 July 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 |
|---|---|---|
| 603 | Manchester | 259 |
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 28 July 2026. Request a correction.
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Browse New Hampshire numbersQuestions
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 28 July 2026, with 259 numbers reported.
Neighbouring states