- Dams, Waterways, & Docks Contractors, Portsmouth
- Dance Companies, Portsmouth
- Data Communications Service, Equipment, Supplies & Sales, Portsmouth
- Data Networking, Portsmouth
- Day Spas, Portsmouth
- Decorating & Designing Services, Portsmouth
- Decorative Wood Products Manufacturers, Portsmouth
- Defense Consulting Agencies, Portsmouth
- Delicatessen Restaurants, Portsmouth
- Denomination, Non-Denominational, Etcetera, Portsmouth
- Dentists, Portsmouth
- Dentures, Portsmouth
- Department Stores, Portsmouth
- Dermatologists, Portsmouth - Skin Doctors, Physicians & Surgeons (Dermatology)
- Designer Clothes & Accessories, Portsmouth
- Designers, Portsmouth
- Dialysis Clinics, Portsmouth - Kidney Dialysis Centers
- Diamonds & Precious & Semi-Precious Stones, Portsmouth
- Die Cutting Machine, Supplies & Equipment, Portsmouth
- Dies, Portsmouth
- Diesel, Portsmouth - Engine Fuels, Oils & Lubricants
- Diet Center, Portsmouth
- Diet Centers, Portsmouth
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- Digital Imaging Photographers, Portsmouth
- Digital Printing & Imaging Service, Portsmouth
- Diner Restaurants, Portsmouth
- Direct Mail Advertising, Portsmouth
- Direct Mail Advertising Services, Portsmouth
- Disc Jockeys, Portsmouth
- Discount Stores, Portsmouth - Clothing, Grocery, Furniture, Etc
- Diving Equipment & Supplies, Portsmouth - Scuba & Snorkel Gear & Masks Shops
- Diving Instruction, Portsmouth
- Doctorate Degree, Portsmouth
- Doctors, Physicians & Surgeons, Portsmouth
- Donuts, Portsmouth
- Doors & Door Frames, Portsmouth - Exterior, Interior, French, Front Entry, Patio, Storm, Garage & Sliding Glass Doors
- Dressmaking & Sewing Schools, Portsmouth
- Drinking Establishments, Portsmouth
- Driveway, Parking Lot & Blacktop Contractors, Portsmouth - Construction, Repair & Maintenance
- Drugs, Pharmaceutical Products & Toiletries - Wholesale & Manufacturers, Portsmouth
- Dry Cleaning & Laundry, Portsmouth - Dry Cleaners
- Drywall, Insulation & Plaster Contractors, Portsmouth - Installation & Repair Services
- DUI Attorneys & Lawyers, Portsmouth - DWI - Drunk Driving
- DUI Lawyers & Attorneys, Portsmouth - DWI - Drunk Driving
- Durable & Non Durable Goods & Products, Portsmouth
- Durable Goods & Products, Portsmouth
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