Question: Where is the telephone area code 571 located?

Disambiguated questions and answers:
context: Area codes 703 and 571 are the North American Numbering Plan telephone area codes for Northern Virginia, including the independent cities of Alexandria, Fairfax, Falls Church, Manassas, and Manassas Park, as well as all of Arlington and Fairfax counties and parts of Fauquier, Loudoun, Prince William, and Stafford counties. The main area code, 703, was created as one of the original 86 North American area codes in October 1947, and originally served the entire Commonwealth of Virginia. Area code 571 was created on March 1, 2000 as an overlay to 703.
question: What counties is the telephone area code 571 located?
short_answers: Fauquier
Loudoun
Prince William
Stafford
Arlington
Fairfax
wikipage: Area codes 703 and 571
context: Area codes 703 and 571 are the North American Numbering Plan telephone area codes for Northern Virginia, including the independent cities of Alexandria, Fairfax, Falls Church, Manassas, and Manassas Park, as well as all of Arlington and Fairfax counties and parts of Fauquier, Loudoun, Prince William, and Stafford counties. The main area code, 703, was created as one of the original 86 North American area codes in October 1947, and originally served the entire Commonwealth of Virginia. Area code 571 was created on March 1, 2000 as an overlay to 703.
question: What cities is the telephone area code 571 located?
short_answers: Alexandria
Fairfax
Falls Church
Manassas
Manassas Park
wikipage: Area codes 703 and 571
context: Area codes 703 and 571 are the North American Numbering Plan telephone area codes for Northern Virginia, including the independent cities of Alexandria, Fairfax, Falls Church, Manassas, and Manassas Park, as well as all of Arlington and Fairfax counties and parts of Fauquier, Loudoun, Prince William, and Stafford counties. The main area code, 703, was created as one of the original 86 North American area codes in October 1947, and originally served the entire Commonwealth of Virginia. Area code 571 was created on March 1, 2000 as an overlay to 703.
question: What General area has the area code 571?
short_answers: Northern Virginia
NOVA
wikipage: Area codes 703 and 571

Long-form answers:
knowledge: content: Area codes 703 and 571 are the North American Numbering Plan telephone area codes for Northern Virginia, including the independent cities of Alexandria, Fairfax, Falls Church, Manassas, and Manassas Park, as well as all of Arlington and Fairfax counties and parts of Fauquier, Loudoun, Prince William, and Stafford counties.
wikipage: Area codes 703 and 571
long_answer: The telephone area code 571 belongs to the general area of Northern Virginia, including a number of cities and counties. It's located in the independent cities of Alexandria, Fairfax, Falls Church, Manassas, and Manassas Park. It's in all of Arlington and Fairfax Counties and parts of Fauquier, Loudoun, Prince William, and Stafford Counties.
long_answer: Area codes 703 and 571 are the North American Numbering Plan telephone area codes for Northern Virginia, including the independent cities of Alexandria, Fairfax, Falls Church, Manassas, and Manassas Park, as well as all of Arlington and Fairfax counties and parts of Fauquier, Loudoun, Prince William, and Stafford counties. Area code 571 was created on March 1, 2000 as an overlay to 703.