New Hampshire area codes
New Hampshire has 1 area code: 603.
Area codes by city in New Hampshire
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of August 2, 2026. Refreshed monthly.
New Hampshire has 1 area code: 603.
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of August 2, 2026. Refreshed monthly.