- Bagels, Ashburn
- Bail Bonds, Ashburn
- Bakeries, Ashburn
- Ballroom Dance Hall, Ashburn
- Bank Supplies & Equipment, Ashburn
- Banks, Ashburn
- Baptist Churches, Ashburn
- Barbecue Restaurants, Ashburn
- Barber Shops, Ashburn
- Barbers, Ashburn
- Bars, Ashburn
- Bars & Grills, Ashburn
- Bathroom Remodeling, Ashburn - Bathroom Remodel & Planning Services
- Battery, Ashburn - Retail Batteries Stores
- Battery Storage, Ashburn
- Battery Stores, Ashburn
- Battery Supplies, Ashburn
- Beach & Water Related Services, Ashburn
- Beauty Consultants, Ashburn
- Beauty Salons, Ashburn
- Bedding & Linens Stores, Ashburn - Bed Sheets, Quilts and Coverlets, Cushions, Pillows, Slipcovers & Bed & Table Linens
- Bedroom Furniture Stores, Ashburn - Master & Kids Bedroom Furniture Sets & Beds
- Beer & Wine Stores, Ashburn
- Beer Taverns, Ashburn
- Beverage Stores, Ashburn
- Bible Church, Ashburn
- Bicycle Repair & Service, Ashburn - Bike Repair Shops
- Bicycle Shops, Ashburn - Road, Hybrid, Folding, BMX, Electric & Mountain Bikes Stores & Dealers
- Billing Services, Ashburn
- Bistros, Ashburn
- Boating & Swimming Clubs, Ashburn
- Bonds, Ashburn
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- Bookkeeping Systems & Services, Ashburn
- Boutiques & Boutique Items, Ashburn
- Brakes & Brake Parts, Ashburn - Brake Pads, Rotors, Calipers, Lines, etc
- Breakfast Restaurants, Ashburn
- Brick Masonry & Bricklayer Contractors, Ashburn - Brick Mason - Install & Repair
- Bricks, Blocks & Stone Products, Ashburn - Companies, Wholesale, Manufacturers & Suppliers
- Broadcasting School, Ashburn
- Brokers Merchandise, Ashburn
- Brooms & Brushes Manufacturers, Ashburn
- Builders & Contractors, Ashburn
- Builders & Contractors - More, Ashburn
- Building & Home Inspection, Ashburn - Real Estate, Building, Land & House Inspection Service
- Building & Land Inspection Service, Ashburn
- Building & Property Maintenance & Services, Ashburn
- Building Construction Consultants, Ashburn - Construction Management & Consulting
- Building Design & Construction Consultants, Ashburn
- Building Hardware & Materials, Ashburn
- Building Inspection Services Commercial, Ashburn
- Building Materials, Ashburn - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Ashburn
- Burglar & Alarm Service, Ashburn - Monitoring Service
- Burglar Alarm Systems, Ashburn
- Business & Professional Associations, Ashburn
- Business & Trade Organizations, Ashburn
- Business Brokers, Ashburn
- Business Communication Consultants, Ashburn
- Business Insurance, Ashburn
- Business Legal Services, Ashburn
- Business Management Consultants, Ashburn
- Business Services, Ashburn
- Business, Vocational & Technical, Ashburn
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