| Business | Phone |
| Precision Security 20265 Valley Blvd # D, Walnut 91789 | (909) 444-7888 |
| Ensign Security Inc 203 Lemon Creek Dr # C, Walnut 91789 | (909) 979-8001 |
| Messoa 398 Lemon Creek Dr, Walnut 91789 | (909) 595-8300 |
| Precision Security 398 Lemon Creek Dr # A, Walnut 91789 | (909) 444-7888 |
| Uso Security 1140 Centre Dr # C, Walnut 91789 | (909) 594-8893 |
| Ventrio Corp 20505 Valley Blvd # 106, Walnut 91789 | (909) 598-0778 |