| Business | Phone |
| Alarm & Security Shop 31 Raymond St, St Catharines L2R 2T3 | (905) 688-4161 |
| Alliance Security Systems 36 Niagara St, St Catharines L2R 4K9 | (905) 688-3223 |
| On Line Security Svc 111 Fourth Ave #107, St Catharines L2S 3P5 | (905) 684-6730 |
| Power Security 76 Ridley Rd, St Catharines L2S 3Y8 | (905) 685-8366 |
| Base Security Svc 1162 Lakeshore Rd W, St Catharines L2R 6P9 | (905) 646-9011 |
| Bomar Alarms Ltd 6 Beecher St, St Catharines L2R 5S5 | (905) 685-5050 |
| Chia Electronics & Security 300 Welland Ave, St Catharines L2R 7L9 | (905) 684-8686 |
| Digital Security Systems Inc 318 Ontario St, St Catharines L2R 5L8 | (905) 685-8778 |
| Ess Alarms 31 Raymond St, St Catharines L2R 2T3 | (905) 688-6572 |
| General Security Svc Po Box 8 Stn Main, St Catharines L2R 6R4 | (905) 641-1271 |