| Business | Phone |
| King Alarm Co 7611 S Osborne Rd, Upper Marlboro 20772 | (301) 574-5095 |
| Neighborhood Watch Hm Security 9701 Apollo Dr, Upper Marlboro 20774 | (301) 322-7553 |
| Parrott Security Inc 15863 Commerce Ct, Upper Marlboro 20774 | (301) 430-7100 |
| Pro Tech Security Svc 5302 Water St # 201, Upper Marlboro 20772 | (443) 474-2654 |
| R & W Security Coml Claiming 1300 Mercantile Ln, Upper Marlboro 20774 | (301) 386-3939 |
| Advanced Management Security 4411 Lieutenant Lansdale Pl, Upper Marlboro 20772 | (301) 780-5300 |
| Security Tech Upper Marlboro 20772 | (301) 599-6405 |
| Trinity Protection Svc Inc 9315 Largo Dr W # 230, Upper Marlboro 20774 | (301) 860-0452 |