Area Code: 47900

Area Name: Washington-Arlington-Alexandria, DC-VA-MD-WV

Counties / Townships:
Alexandria city; Arlington County; Calvert County; Charles County; Clarke County; Culpeper County; District of Columbia; Fairfax city; Fairfax County; Falls Church city; Fauquier County; Frederick County; Fredericksburg city; Jefferson County; Loudoun County; Manassas city; Manassas Park city; Montgomery County; Prince George's County; Prince William County; Rappahannock County; Spotsylvania County; Stafford County; Warren County