| Business | Phone |
| Advanced Protective Technology 5150 Franz Rd, Katy 77493 | (281) 391-4199 |
| Alarmtechs 10575 Katy Fwy, Katy 77450 | (281) 347-2190 |
| Alarmtechs Inc 1534 Avenue C, Katy 77493 | (281) 391-5005 |
| Centurion Alarm Svc Inc 5000 Katy Mills Cir, Katy 77494 | (281) 574-4859 |
| Intercep Security 22334 Prince George Ln, Katy 77449 | (281) 347-3655 |