What is 571 area code?

The 571 area code serves Northern Virginia, a region within the Commonwealth of Virginia in the United States. It is an overlay code, meaning it covers the same geographic area as another area code – in this case, 202 area code and 703 area code. Because of the increasing demand for phone numbers in the region, 571 was introduced to provide additional number resources.

The area covered by 571 includes major cities and counties such as Fairfax County, Arlington County, Loudoun County, and Alexandria. Being an overlay, using 571 requires ten-digit dialing (area code + number) for all calls, even local ones, to avoid confusion with numbers assigned to the other area codes in the same geographic space.