| Business | Phone |
| Century Tech Security 6601 Victoria Ave, Highland 92346 | (909) 864-6302 |
| Global Security Highland 92346 | (909) 864-4577 |
| Inland Empire Security Svc 7231 Boulder Ave # 297, Highland 92346 | (909) 425-1356 |
| Inland Empire Security Svc 7750 Palm Ave # Q, Highland 92346 | (909) 425-1356 |
| Jim Miller's Security 6800 Browning Rd, Highland 92346 | (909) 841-7472 |
| South West Protection Svc 1595 Del Rosa # F, Highland 92346 | (909) 873-3512 |