| Business | Phone |
| Barton Protective Svc 1065 E Hillsdale Blvd, Foster City 94404 | (650) 358-0284 |
| Bay Cities Patrol Po Box 4401, Foster City 94404 | (650) 345-1011 |
| Guardian Protective Svc 1029 Foster City Blvd # C, Foster City 94404 | (650) 627-9282 |
| S & T Properties 296 Boothbay Ave, Foster City 94404 | (650) 570-5561 |
| Scott Security Svc 969 Edgewater Blvd # G, Foster City 94404 | (650) 572-1641 |
| Tasc Security Inc 1840 Gateway Dr # 200, Foster City 94404 | (415) 297-5849 |