Area code 603
Area code 603 is a telephone area code in the North American Numbering Plan. It serves New Hampshire, the United States.
- 603area code
- NHNew Hampshire
- UScountry
- 1-Jan-47in service
How to dial a 603 number
From within the United States and Canada, dial 1, then 603, then the seven-digit number. From another country, dial your international access code, then +1 603 and the seven-digit number.
Frequently asked questions
Where is area code 603?
Area code 603 serves New Hampshire, the United States.
What is the country code for a 603 number?
Numbers with North American area codes use the country calling code +1.