| Business | Phone |
| Adt Security Svc 4801 Voges Rd G, Madison 53718 | (608) 838-9500 |
| All-Channel Electronics Inc 6621 Seybold Rd, Madison 53719 | (608) 274-4440 |
| Alliant Energy Resources Home Madison 53716 | (608) 221-9962 |
| Brink's Home Security Inc Madison 53703 | (608) 259-9377 |
| Simplex Grinnell 3214 Kingsley Way, Madison 53713 | (608) 274-1244 |
| I T Controls 544 W Wilson St, Madison 53703 | (608) 257-9629 |
| Office Commissioner-Security 345 W Wash Ave, Madison 53703 | (608) 284-9029 |
| Per Mar Security Svc Inc 5005 University Ave # 120, Madison 53705 | (608) 238-9295 |
| Mid Wisconsin Security Inc 4313 W Beltline Hwy, Madison 53711 | (608) 233-5039 |
| Madison Integrated Systems 1409 Greenway Cross, Madison 53713 | (608) 271-5865 |
| Madison Midwest Security 405 Oak Crest Ave, Madison 53705 | (608) 238-4017 |