| Business | Phone |
| Security Works Inc 311 E County Line Rd, Littleton 80122 | (303) 730-8444 |
| Signature Alert Littleton 80120 | (303) 730-2959 |
| Western Alarm Co Llc 11426 W Frost Pl, Littleton 80127 | (303) 973-7443 |
| Guardian Angel Protection Svc 11550 Homestake Peak, Littleton 80127 | (303) 973-7773 |
| Home Alone Security 7664 W Ontario Pl, Littleton 80128 | (303) 972-7753 |