- Nail Salons, Newport Beach
- Nanny Services, Newport Beach
- National Commercial Banks, Newport Beach
- National Government, Newport Beach
- Natural & Holistic Products, Newport Beach
- Natural Landscaping Stone, Newport Beach
- Natural Stone, Newport Beach - Suppliers & Wholesalers
- Network Designers, Newport Beach - Computer Networking Design & Systems
- Network Marketing, Newport Beach
- Neurologists, Newport Beach - Neurology Doctors, Physicians & Surgeons
- Newspaper Manufacturers, Newport Beach
- Night Clubs, Newport Beach - Nightclub & Night Life
- Nissan Dealers, Newport Beach
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- Noncommercial Research Organizations, Newport Beach
- Noncommercial Social Research Organization, Newport Beach
- Nonresidential Building Operators, Newport Beach
- North American Restaurants, Newport Beach
- Notary Public, Newport Beach
- Novelty, Souvenir & Gift Shops, Newport Beach
- Nurseries & Garden Centers, Newport Beach
- Nurseries Wholesale & Growers, Newport Beach
- Nurses, Newport Beach
- Nurses Registered, Newport Beach
- Nursing Homes, Newport Beach - Skilled Nursing Facility - Personal Care Centers
- Nutritionists & Nutrition Consultants, Newport Beach - Nutrition Centers
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