- Dairy Products - Wholesale & Retail, North Bellmore
- Data Processing Services, North Bellmore
- Day Spas, North Bellmore
- Decorating & Designing Services, North Bellmore
- Delicatessen Restaurants, North Bellmore
- Dental Bonding & Cosmetic Dentistry, North Bellmore - Cosmetic Dentist & Tooth Bonding
- Dental Consultants, North Bellmore
- Dentists, North Bellmore
- Developmental Disabilities, North Bellmore
- Direct Magazine Sales & Delivery, North Bellmore
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- Direct Selling Businesses, North Bellmore
- Disabled Persons Assistive Services, North Bellmore
- Displays & Display Installation Service, North Bellmore - Trade Show Displays
- Doctorate Degree, North Bellmore
- Doctors, Physicians & Surgeons, North Bellmore
- Donuts, North Bellmore
- Drafting Services, North Bellmore
- Drinking Establishments, North Bellmore
- Dry Cleaning & Laundry, North Bellmore - Dry Cleaners
- Dry Well Contractors, North Bellmore
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