Where is 603 area code?
Understand the Problem
The question is asking for the geographical region or location that corresponds to the 603 area code, which is typically associated with telephone numbers.
Answer
New Hampshire
The 603 area code is in New Hampshire.
Answer for screen readers
The 603 area code is in New Hampshire.
More Information
The 603 area code is the only area code for the entire state of New Hampshire.
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