| Area Code | 571 |
| State | Virginia |
| Current Time in Area Code 571 | 571> EST |
| Timezone | Eastern Standard Time |
| Regional Market Area | Metro DC |
| Metro Area(s) | Washington-Arlington-Alexandria, DC-VA-MD-WV |
| Population (2020) | 2550377 |
| Adjacent Area Codes | 202,227,240,301,540,703,771,826 |
| Overlay Area Codes | 227,240,301,703 |
| City of Alexandria |
| Arlington County |
| City of Fairfax |
| Fairfax County |
| City of Falls Church |
| Loudoun County |
| City of Manassas |
| City of Manassas Park |
| Prince William County |
| Alexandria |
| Annandale |
| Arlington |
| Ashburn |
| Burke |
| Centreville |
| Dale City |
| Fair Oaks |
| Lake Ridge |
| Leesburg |
| Linton Hall |
| Manassas |
| McLean |
| Oakton |
| Reston |
| South Riding |
| Springfield |
| Sterling |