| Business | Phone |
| Code 3 Security 1961 Freeman Ave, Signal Hill 90755 | (562) 494-6006 |
| Platt Security Svc 3275 E Grant St # D, Signal Hill 90755 | (562) 986-4484 |
| Securitas Security Svc Usa Inc 1240 E 29th St # 114, Signal Hill 90755 | (562) 427-2737 |
| Lincoln Security Svc 1240 E 29th St, Signal Hill 90755 | (562) 802-2474 |