| Business | Phone |
| Clockwork Security Inc 6230 3rd St Nw # 1, Washington 20011 | (202) 723-3365 |
| American Security & Comm 7348 Georgia Ave Nw, Washington 20012 | (202) 829-7327 |
| Clock Work Security 841 52nd St Ne, Washington 20019 | (202) 397-8115 |
| Global Options Alarm Inc 1615 L St Nw, Washington 20036 | (202) 861-4246 |
| Sfc Systems 4201 Massachusetts Nw # 2065, Washington 20016 | (202) 362-6207 |