| Business | Phone |
| Denver B Moore Investigations Pleasanton 94588 | (925) 460-0244 |
| Gab Investigations Po Box 10385, Pleasanton 94588 | (925) 846-7401 |
| Prefered Investigators-Cnsltg 2186 Rheem Dr, Pleasanton 94588 | (925) 462-6604 |
| Quayle Investigations 5424 Sunol Blvd # 10, Pleasanton 94566 | (925) 484-1837 |
| Visionquest Enterprises Pleasanton 94566 | (925) 846-1244 |