| Business | Phone |
| Symmetrix Gaithersburg 20877 | (301) 869-3790 |
| Clark Communications 2 Professional Dr # 228, Gaithersburg 20879 | (301) 987-7113 |
| Preception Inc 839 Quince Orch Blvd # B, Gaithersburg 20878 | (301) 963-7555 |
| Ihlas Holding 12704 Hallman Ct, Gaithersburg 20878 | (301) 670-8521 |