- Machine Shop & Tool Repair Service, Phillipsburg
- Machinery, Supplies & Equipment - Business Production Related, Phillipsburg
- Machinery, Supplies & Equipment - Construction & Contractor Related, Phillipsburg
- Mail Delivery Service, Phillipsburg
- Major Appliances, Phillipsburg - Household & Kitchen
- Management Consultants & Services, Phillipsburg
- Manufacturing, Phillipsburg
- Marriage & Family Counselors, Phillipsburg
- Masonry Materials & Supplies, Phillipsburg
- Medical Supplies & Equipment, Phillipsburg
- Mental Health Clinics, Phillipsburg - Treatment Centers
- Mental Health Specialists, Phillipsburg - Psychologist, Psychiatrist, Psychotherapist, etc
- Merchandise Sales Events, Phillipsburg
- Methodist Church, Phillipsburg
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- Mining, Phillipsburg
- Miscellaneous Government, Phillipsburg
- Miscellaneous Industry, Phillipsburg
- Miscellaneous Professional, Phillipsburg
- Mortgage Bankers & Correspondents, Phillipsburg
- Mortgage Companies, Phillipsburg
- Motor Vehicle, Phillipsburg
- Motor Vehicle Rental & Leasing, Phillipsburg
- Movie Theaters, Phillipsburg
- Moving Supplies & Equipment Rental, Phillipsburg
- Moving Truck Rental , Phillipsburg
- Muffler Shop & Exhaust Systems, Phillipsburg
- Museums, Phillipsburg
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