| Business | Phone |
| Earl Security Inc 620 S Del Mar Ave, San Gabriel 91776 | (626) 285-9178 |
| Sds Security Design Systems 1119 E Las Tunas Dr, San Gabriel 91776 | (323) 227-6262 |
| Security Design Systems Inc 1119 E Las Tunas Dr, San Gabriel 91776 | (626) 285-7268 |
| Monitor Security Sytems San Gabriel 91776 | (626) 286-0511 |