- Baha'i Church, Portsmouth
- Bail Bonds, Portsmouth
- Bakeries, Portsmouth
- Banks, Portsmouth
- Banquet Halls, Portsmouth
- Banquet Halls, Reception Halls & Party Facilities, Portsmouth
- Baptist Churches, Portsmouth
- Barbecue Restaurants, Portsmouth
- Barber Schools, Portsmouth
- Barbers, Portsmouth
- Bars, Portsmouth
- Bars & Grills, Portsmouth
- Baseball & Softball Clubs, Portsmouth
- Bathroom Fixtures, Portsmouth - Bathroom Faucets, Bathtubs, Sinks, Shower Heads & Fixtures, etc
- Bathroom Remodeling, Portsmouth - Bathroom Remodel & Planning Services
- Battery, Portsmouth - Retail Batteries Stores
- Battery Storage, Portsmouth
- Beads Decor, Portsmouth
- Beauty Consultants, Portsmouth
- Beauty Salons, Portsmouth
- Bed & Breakfast, Portsmouth
- Bedding & Linens Stores, Portsmouth - Bed Sheets, Quilts and Coverlets, Cushions, Pillows, Slipcovers & Bed & Table Linens
- Bedding & Mattress Manufacturers Supplies, Portsmouth
- Bedroom Furniture Stores, Portsmouth - Master & Kids Bedroom Furniture Sets & Beds
- Beef Restaurants, Portsmouth
- Beer & Wine Stores, Portsmouth
- Beer Brewing Supplies & Equipment, Portsmouth
- Beer Taverns, Portsmouth
- Behavioral Health Doctors, Physicians & Surgeons, Portsmouth - Behavioral Medicine
- Beverage Stores, Portsmouth
- Beverages, Portsmouth
- Bible Church, Portsmouth
- Bicycle Rentals, Portsmouth - Bike Rental
- Bicycle Repair & Service, Portsmouth - Bike Repair Shops
- Bicycle Shops, Portsmouth - Road, Hybrid, Folding, BMX, Electric & Mountain Bikes Stores & Dealers
- Billing Services, Portsmouth
- Bird Repellent, Barrier & Control, Portsmouth
- Birth Control & Family Planning Clinics, Portsmouth
- Bistros, Portsmouth
- Blood Bank & Center, Portsmouth
- Boat & Yacht Charter, Portsmouth
- Boat & Yacht Charters, Portsmouth
- Boat Covers, Tops & Upholstery, Portsmouth
- Boat Motors & Marine Equipment Dealers, Portsmouth
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- Boat Services, Portsmouth
- Boat, Yacht & Sail Boat Transport, Portsmouth
- Boating & Swimming Clubs, Portsmouth
- Boats & Yachts, Portsmouth - Yachts, Sailboats & Boats for Sale
- Bonds, Portsmouth
- Bonds Surety & Fidelity, Portsmouth
- Book Binders & Folders, Portsmouth - Office Supplies
- Book Publishers, Portsmouth - Book Printing & Publishing
- Bookkeeping Services Licensed, Portsmouth
- Bookkeeping Systems & Services, Portsmouth
- Books, Magazines & Newspapers Stores, Portsmouth - Bookstores
- Botanical & Zoological Gardens, Portsmouth
- Botanical Gardens, Portsmouth
- Boutiques & Boutique Items, Portsmouth
- Bowling Centers, Portsmouth
- Brake Service & Repair, Portsmouth - Brake Pads
- Breakfast Restaurants, Portsmouth
- Brick Masonry & Bricklayer Contractors, Portsmouth - Brick Mason - Install & Repair
- British Restaurants, Portsmouth
- Builders & Contractors, Portsmouth
- Builders & Contractors - More, Portsmouth
- Builders Hardware Stores, Portsmouth
- Building & Property Maintenance & Services, Portsmouth
- Building Construction Consultants, Portsmouth - Construction Management & Consulting
- Building Hardware & Materials, Portsmouth
- Building Materials, Portsmouth - Wholesale, Manufacturers, Dealers & Suppliers
- Building Materials & Supplies, Portsmouth
- Building Materials Used, Portsmouth
- Building Materials, Glass, Portsmouth
- Building Restoration & Preservation, Portsmouth
- Burglar Alarm Systems, Portsmouth
- Bus Lines, Portsmouth - Bus Transportation
- Bus Lines Ticket Agencies, Portsmouth
- Bus Rental & Charter Bus Service, Portsmouth
- Business & Professional Associations, Portsmouth
- Business Brokers, Portsmouth
- Business Communication Consultants, Portsmouth
- Business Insurance, Portsmouth
- Business Legal Services, Portsmouth
- Business Machines Repair, Portsmouth
- Business Management Consultants, Portsmouth
- Business Services, Portsmouth
- Business, Vocational & Technical, Portsmouth
- Butcher Shops, Portsmouth
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