- Machine Shop, Belleville
- Machine Shop & Tool Repair Service, Belleville
- Machine Tools , Belleville
- Machinery And Equipment Manufacturers, Belleville
- Machinery Movers & Erectors, Belleville
- Machinery, Supplies & Equipment - Business Production Related, Belleville
- Machinery, Supplies & Equipment - Business Supplies Related, Belleville
- Machinery, Supplies & Equipment - Construction & Contractor Related, Belleville
- Magazine & Newspaper Stands, Belleville - Dealers & Distributors
- Mailbox Rental Services, Belleville
- Mailing, Delivery & Courier Service, Belleville
- Maintenance, Cleaning & Sanitation, Belleville
- Major Appliances, Belleville - Household & Kitchen
- Make Up Masquerade & Theatrical, Belleville
- Malpractice Attorneys & Lawyers, Belleville
- Malpractice Attorneys & Lawyers, Belleville
- Malpractice Lawyers & Attorneys, Belleville
- Mammography Clinics, Belleville - Breast Cancer Screening
- Management Consultants & Services, Belleville
- Manicurists & Pedicurists, Belleville
- Manifold Business Forms Manufacturers, Belleville
- Manufacturers Agents & Representatives, Belleville
- Manufacturers Representative, Belleville - Reps, Independent Sales Representative, Sales Agent, etc
- Manufacturing, Belleville
- Manufacturing Products, Belleville
- Manufacturing Services, Belleville
- Marine Supplies & Equipment, Belleville - Boat Supplies
- Marriage & Family Counselors, Belleville
- Martial Arts & Self Defense Schools, Belleville
- Masonry Materials & Supplies, Belleville
- Massage Therapists & Professional, Belleville
- Massage Therapy, Belleville
- Material Handling & Heavy Machinery & Equipment, Belleville
- Mechanical Contractors, Belleville - Install, Service & Repair
- Medical & Dental Management, Belleville
- Medical Diagnostic Clinics, Belleville - Clinical Labs & Centers
- Medical Management & Business Administration Service, Belleville
- Medical Supplies & Equipment, Belleville
- Membership Sports & Recreation Clubs, Belleville
- Men's Clothing Stores, Belleville - Clothes & Accessories
- Mental Health Clinics, Belleville - Treatment Centers
- Mental Health Specialists, Belleville - Psychologist, Psychiatrist, Psychotherapist, etc
- Merchandise Sales Events, Belleville
- Metal Finishers, Belleville
- Metal Plating & Polishing, Belleville
- Metal Polishing & Buffing, Belleville
- Metal Repair Service & Blacksmith, Belleville - Iron Works
- Metal Working Machinery, Belleville
- Metaphysical Churches, Belleville
- Methodist Church, Belleville
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- Mexican Restaurants, Belleville
- Mildew Removal & Control, Belleville - Mold Removal
- Mill Roll Corrugating Manufacturers, Belleville
- Ministries Church, Belleville
- Mirrors, Belleville - Custom, Framed, Bathroom, Vanity & Wall Mirrors
- Miscellaneous Business Product Repair, Belleville
- Miscellaneous Household Item Repair, Belleville
- Miscellaneous Agriculture, Belleville
- Miscellaneous Government, Belleville
- Miscellaneous Industry, Belleville
- Miscellaneous Manufacturing, Belleville
- Miscellaneous Personal Services, Belleville
- Miscellaneous Photographers, Belleville
- Miscellaneous Professional, Belleville
- Mission Churches, Belleville
- Mobile Home Contractors, Belleville
- Mobile Home Improvements & Repairs, Belleville
- Mobile Home Parks & Communities , Belleville
- Mobile Homes, Belleville
- Mobile Homes Manufactures, Belleville
- Mobile Lube Systems, Belleville
- Modular & Mobile Homes For Sale, Belleville - Manufactured Homes Sale & Service
- Monuments, Tombstones, Markers & Memorials, Belleville
- Mortgage Bankers & Correspondents, Belleville
- Mortgage Companies, Belleville
- Mortgages & Loans, Belleville
- Mosquito Control, Belleville
- Motor Vehicle, Belleville
- Motor Vehicle Rental & Leasing, Belleville
- Motorcycle & Motor Scooters Dealers, Repair & Service, Belleville
- Motorcycle Parts, Accessories & Dealers, Belleville
- Motorcycle Repair & Service, Belleville
- Movie Theaters, Belleville
- Moving & Storage Supplies & Equipment, Belleville
- Moving Companies, Belleville
- Moving Services - Labor & Material, Belleville
- Moving Supplies & Equipment Rental, Belleville
- Moving Truck Rental , Belleville
- Muffler Shop & Exhaust Systems, Belleville
- Mulch, Peat & Moss Products, Belleville
- Museums, Belleville
- Music, Belleville
- Music Entertainment, Belleville
- Music Lessons, Belleville
- Music Lessons - Instrumental, Belleville
- Musical Instrument Rental, Belleville - Band & Orchestra Instruments
- Musical Instruments & Equipment Stores, Belleville
- Musical Instruments Repair, Sales & Service, Belleville
- Musicians, Bands & Disc Jockeys, Belleville
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