| Business | Phone |
| Prince George's County Assn 8400 Corporate Dr # 225, Landover 20785 | (301) 306-7900 |
| Ripa-Reusable Industrial 8401 Corporate Dr # 450, Landover 20785 | (301) 577-3786 |
| American Railway Engineering 8201 Corporate Dr, Landover 20785 | (301) 459-3200 |
| Society Of Logistics Engineers 8100 Professional Pl # 211, Landover 20785 | (301) 459-8446 |
| Biomedical Engineering Society 8401 Corporate Dr # 225, Landover 20785 | (301) 459-1999 |
| Contact Lens Institute 8201 Corporate Dr # 850, Landover 20785 | (301) 459-1800 |