- Machine Shop & Tool Repair Service, Newport
- Machinery, Supplies & Equipment - Construction & Contractor Related, Newport
- Major Appliances, Newport - Household & Kitchen
- Management Consultants & Services, Newport
- Manicurists & Pedicurists, Newport
- Manufacturing, Newport
- Marriage & Family Counselors, Newport
- Masonry Contractors, Newport - Stone Mason, Brick Mason - Install & Repair
- Masonry Materials & Supplies, Newport
- Medical Diagnostic Clinics, Newport - Clinical Labs & Centers
- Membership Sports & Recreation Clubs, Newport
- Mental Health Specialists, Newport - Psychologist, Psychiatrist, Psychotherapist, etc
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- Merchandise Sales Events, Newport
- Methodist Church, Newport
- Miscellaneous Government, Newport
- Miscellaneous Industry, Newport
- Miscellaneous Personal Services, Newport
- Miscellaneous Photographers, Newport
- Miscellaneous Professional, Newport
- Modular & Mobile Homes For Sale, Newport - Manufactured Homes Sale & Service
- Motor Vehicle, Newport
- Music, Newport
- Musical Instruments & Equipment Stores, Newport
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