| Business | Phone |
| First Cavalry Security Fairfield 94533 | (707) 427-3660 |
| Honeywell Pai 380 Chadbourne Rd, Fairfield 94534 | (707) 425-9902 |
| I C Security Svc 826 Empire St, Fairfield 94533 | (707) 422-9410 |
| Inter-Con Security Systems 2450 S Watney Way, Fairfield 94533 | (707) 438-7000 |
| Martin & Assoc Investigative Fairfield 94534 | (707) 207-0176 |
| Service Pro Security 342 Acacia St, Fairfield 94533 | (707) 425-9346 |