| Business | Phone |
| Amerix 8930 Stanford Blvd, Columbia 21045 | (410) 910-1834 |
| Cleaning Authority 9017 Red Branch Rd, Columbia 21045 | (410) 740-1900 |
| Eastern Sales & Marketing 9192 Red Branch Rd, Columbia 21045 | (410) 997-9381 |
| Epi Tech 5565 Sterrett Pl # 406, Columbia 21044 | (410) 715-2001 |
| Global Diversity Group Inc 5575 Sterrett Pl # 320, Columbia 21044 | (410) 730-6906 |
| Harbor Marketing Inc 9755 Patuxent Woods Dr, Columbia 21046 | (443) 259-2163 |
| Icelandair North America 5950 Symphony Woods Rd # 410, Columbia 21044 | (410) 715-1600 |
| Rohde & Schwarz 8661 Robert Fulton Dr # A, Columbia 21046 | (410) 910-7800 |