Most of Fairfax County including:

Herndon, Reston, Great Falls, McLean, Vienna, Falls Church, Annandale, Fairfax, North and West Springfield, Clifton, Oakton, Chantilly, Centreville Virginia

All of Loudoun County including:

Sterling, Ashburn, Dulles, Brambleton, Lansdowne, Leesburg, Lovettsville, Lucketts, Waterford, Aldie, Middleburg, Purcellville, Hamilton, Round Hill, Bluemont, South Riding Virginia

Arlington County Virginia

Alexandria Virginia

Northern Parts of Fauquier County - nearer to Middleburg and Upperville.

All of Clarke County including Berryville Virginia

Frederick County: Winchester Virginia area

Maryland

• Sourthern Montgomery County near Potomac , Bethesda, White's Ferry Dickerson and Poolesville
• Sourthern Frederick County between Frederick and the Potomac.
• Southern Washington County between Harpers Ferry and Boonsboro, Middletown.