Area Code Lookup
What Area Code Is Merrimack?
Area code 603 · New Hampshire
Merrimack uses area code 603. It is located in New Hampshire.
Area Code Serving Merrimack
Frequently Asked Questions
What area code is Merrimack?
Merrimack uses area code 603. It is located in New Hampshire.
How do I call Merrimack from outside the US?
To call Merrimack 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.