| Business | Phone |
| A-1 Monitoring Svc 1530 S Big Bend Blvd, St Louis 63117 | (314) 781-6290 |
| Acf Alarm Co 9021 Riverview Dr, St Louis 63137 | (314) 869-8500 |
| Alarm 24 Inc 9496 Dielman Rock Island Ind, St Louis 63132 | (314) 567-3773 |
| Alarm Co 8850 Alva Ave, St Louis 63121 | (314) 429-1331 |
| Alarm Systems 1706 Muriel Dr, St Louis 63138 | (314) 653-1666 |
| Amcominc.Net 4460 Telegraph Rd, St Louis 63129 | (314) 729-2100 |
| Auto Alarm Ctr 4057 Meramec St, St Louis 63116 | (314) 832-1212 |
| Baumann Safe & Alarm 3137 Locust St, St Louis 63103 | (314) 533-2800 |
| U S Alarm Of Missouri 5661 Telegraph Rd, St Louis 63129 | (314) 846-8200 |
| St Louis Burglary & Fire Inc 6315 Alexander Dr, St Louis 63105 | (314) 726-9999 |
| Protection One Inc 1905 Belt Way Dr, St Louis 63114 | (314) 426-1269 |
| R & T Communications 2138 Woodson Rd # 7, St Louis 63114 | (636) 332-1962 |
| Midwest Alarms Plus 2801 Meramec St, St Louis 63118 | (314) 481-5518 |
| Omni Information Svc Inc 5925 Weber Rd, St Louis 63123 | (314) 631-7587 |
| Marion's Auto Alarm & Electric 5018 Martin Luther King Dr, St Louis 63108 | (314) 361-6200 |
| Metro Alarm Systems 5788 Waterman Blvd, St Louis 63112 | (314) 524-7470 |
| Interface 3441 Morganford Rd, St Louis 63116 | (636) 464-7997 |
| Fort Knox Security 3441 Morganford Rd, St Louis 63116 | (314) 664-3222 |
| Hackett Security Inc 9811 S 40 Dr, St Louis 63124 | (314) 432-4200 |
| Gateway Alarm Inc 5923 Weber Rd, St Louis 63123 | (314) 487-2224 |
| Central District Alarm Inc 6450 Clayton Ave, St Louis 63139 | (314) 647-2001 |
| Central Station 5605 Hampton Ave, St Louis 63109 | (314) 832-8700 |
| City Alarm Co 1940 Mitchell Pl, St Louis 63139 | (314) 645-5500 |
| Eagle Security 2138 Woodson Rd # 10, St Louis 63114 | (314) 427-3926 |
| Centerpoint Technologies 2001 S Hanley Rd # 530, St Louis 63144 | (314) 644-5255 |
| Century Alarm Co 1513 Irving Ave, St Louis 63133 | (314) 383-1513 |
| Century Alarm Co 7420 Page Ave, St Louis 63133 | (314) 721-8760 |