Where is the 703 area code?

What city or cities use the 703 telephone area code?

Adam answers:

703 is an area code used in the section of Northern Virginia that borders Washington, D.C., including the cities of Alexandria, Fairfax, Falls Church, Manassas, Arlington, and nearby areas.

Because of the growth in population of Northern Virginia, the 703 area code is now smaller in geographic area than in the past, and the 571 area code is also in use in the same places where you would find 703 phone numbers, due to 703 numbers being used up so quickly.