- Mahin Behbehanian MD
- Mahoney Realty Group Inc
- Mai Ty Productions Inc
- Main Line Allergy & Pulmonary
- Main Line Automotive Inc
- Main Line Beverage Co
- Main Line Chiropractic
- Main Line Coin & Stamp Inc
- Main Line Conservatory-Music
- Main Line Executive D J's
- Main Line Executive Management
- Main Line Executive Realty Inc
- Main Line Exterminating Co
- Main Line Foot & Ankle Ctr
- Main Line Italian American
- Main Line Jewel Of India
- Main Line Life
- Main Line Master Locksmith
- Main Line Music Academy
- Main Line Optical
- Main Line Pediatric Thrpy Ctr
- Main Line Post Home Assn Inc
- Main Line Psychological/Ed
- Main Line Quality Cleaners
- Main Line Sea Food Market
- Mainline Family Medicine
- Maleka Fine Linens & Down
