- Machine Shop & Tool Repair Service, Levelland
- Machinery, Supplies & Equipment - Business Production Related, Levelland
- Machinery, Supplies & Equipment - Business Supplies Related, Levelland
- Machinery, Supplies & Equipment - Construction & Contractor Related, Levelland
- Mailing, Delivery & Courier Service, Levelland
- Major Appliances, Levelland - Household & Kitchen
- Management Consultants & Services, Levelland
- Manicurists & Pedicurists, Levelland
- Manufacturing, Levelland
- Manufacturing & Industrial Consultants, Levelland
- Manufacturing Products, Levelland
- Marriage & Family Counselors, Levelland
- Masonry Materials & Supplies, Levelland
- Meat Market, Wholesale & Products, Levelland
- Medical Diagnostic Clinics, Levelland - Clinical Labs & Centers
- Medical Supplies & Equipment, Levelland
- Membership Sports & Recreation Clubs, Levelland
- Mental Health Specialists, Levelland - Psychologist, Psychiatrist, Psychotherapist, etc
- Metal Buildings, Levelland - Wood Buildings
- Metal Buildings, Levelland - Kits, Homes, Steel Buildings, etc
- Methodist Church, Levelland
- Mexican Restaurants, Levelland
- Michelin Tires, Levelland - Dealers
- Mini & Self Storage, Levelland
- Mining, Levelland
- Miscellaneous Business Credit Institutions & Services, Levelland
- Miscellaneous Business Services, Levelland
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- Miscellaneous Government, Levelland
- Miscellaneous Personal Services, Levelland
- Miscellaneous Photographers, Levelland
- Miscellaneous Professional, Levelland
- Mobile Home Parks & Communities , Levelland
- Modular & Mobile Homes For Sale, Levelland - Manufactured Homes Sale & Service
- Modular Buildings, Levelland - Modular Homes Buildings & Offices
- Money Transfer Service, Levelland
- Monuments, Tombstones, Markers & Memorials, Levelland
- Mortgage Bankers & Correspondents, Levelland
- Mortgage Companies, Levelland
- Mortgages & Loans, Levelland
- Motor Vehicle, Levelland
- Motor Vehicle Rental & Leasing, Levelland
- Moving & Storage Supplies & Equipment, Levelland
- Moving Companies, Levelland
- Moving Supplies & Equipment Rental, Levelland
- Moving Truck Rental , Levelland
- Muffler Shop & Exhaust Systems, Levelland
- Music, Levelland
- Music Lessons, Levelland
- Music Lessons - Instrumental, Levelland
- Music Schools, Levelland
- Musical Instrument Rental, Levelland - Band & Orchestra Instruments
- Musical Instruments & Equipment Stores, Levelland
- Musical Recording Services, Levelland
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