Area Codes
| 571 | Virginia (Northern Virginia: Alexandria, Arlington, Fairfax, Prince William and eastern Loudoun counties, overlays with 703) | More information at: Area Code 571 Phone Number Blocks
| 571 | Virginia (Northern Virginia: Alexandria, Arlington, Fairfax, Prince William and eastern Loudoun counties, overlays with 703) | More information at: Area Code 571 Phone Number Blocks