Area Code Lookup
What Area Code Is Londonderry?
Area code 603 · New Hampshire
Londonderry uses area code 603. It is located in New Hampshire.
Area Code Serving Londonderry
Frequently Asked Questions
What area code is Londonderry?
Londonderry uses area code 603. It is located in New Hampshire.
How do I call Londonderry from outside the US?
To call Londonderry from abroad, dial +1 followed by the area code and 7-digit local number (e.g. +1-603-XXX-XXXX). The +1 is the country code for all NANPA countries.