| Business | Phone |
| Mid-North Protection Svc Ltd 109 Elm St #2a, Sudbury P3C 1T4 | (705) 673-4600 |
| Beeline Security 737 Grandview Blvd, Sudbury P3A 4T6 | (705) 560-5912 |
| Scandinavian Security 1172 Southview Dr, Sudbury P3E 2L6 | (705) 522-1188 |
| Son-Mar Security Inc 827 Barrydowne Rd, Sudbury P3A 3T6 | (705) 521-1990 |
| True Steel Security 230 Alder St, Sudbury P3C 4J2 | (705) 674-0116 |
| Chubb Security Systems 1040 Lorne St #7, Sudbury P3C 4R9 | (705) 524-7211 |
| Continental Nitehawk Security 1546 Bellevue Ave, Sudbury P3B 3G2 | (705) 671-0099 |
| Derro Security & Alarm Systems 288 Victoria St, Sudbury P3C 1K4 | (705) 674-6070 |
| F M Security 923 Delaware Ave, Sudbury P3A 3X8 | (705) 688-7233 |