| Business | Phone |
| Annapolis Zelkos Security Syst 1981 Moreland Pkwy # 2, Annapolis 21401 | (410) 263-4457 |
| Certified Inc 2983 Southhaven Dr, Annapolis 21401 | (410) 573-0699 |
| Gts Global Security Svc Llc 201 Forbes St, Annapolis 21403 | (443) 482-2760 |
| Harris Security 501 Little Current Dr, Annapolis 21401 | (410) 349-2200 |
| Labrepco 132 Quiet Waters Pl, Annapolis 21403 | (410) 268-6685 |
| Securityproductsctr.Com 1948 West St, Annapolis 21401 | (410) 897-0087 |