| Business | Phone |
| Red Alert Security Systems 15 Jill Ter, Randolph 7869 | (973) 598-1191 |
| Security Engineering 69 Everdale Rd, Randolph 7869 | (973) 361-9099 |
| Sentry Safe Alarms Inc 8 Cambridge Ct, Randolph 7869 | (973) 989-8647 |
| Uniguard Security Systems 6 Draco Dr, Randolph 7869 | (973) 584-2883 |