| Business | Phone |
| Advanced Digital Technologies 521 N Mountain Ave, Upland 91786 | (909) 373-1697 |
| Alarm Consultants & Designs 846 W Foothill Blvd # O, Upland 91786 | (909) 981-1312 |
| Alert Security Systems 1318 Monte Vista Ave # 2, Upland 91786 | (909) 946-5787 |
| National Alarm Computer Center Upland 91786 | (909) 981-9002 |
| Preventor Security Center 360 Paxton Ct, Upland 91784 | (909) 946-9270 |
| Sos Alarms Adt Authorized 1743 W Foothill Blvd, Upland 91786 | (909) 608-9115 |
| Sos Alarms-Adt 600 N Mountain Ave, Upland 91786 | (909) 608-9115 |
| Southwest Alarm Svc Po Box 1133, Upland 91785 | (909) 987-8936 |