| Business | Phone |
| Accessecurity Inc 751 Miller Dr Se B1, Leesburg 20175 | (703) 771-2181 |
| Adt Allswell Detection Svc 100 Dry Mill Rd Sw, Leesburg 20175 | (703) 779-8060 |
| Aegis Technologies Inc 316 E Market St, Leesburg 20176 | (703) 443-9755 |
| National Security Inc Leesburg 20176 | (703) 771-1000 |