| Business | Phone |
| Cerberus & Co Po Box 2032, Vallejo 94592 | (707) 562-3800 |
| Haole & Kanaka Assoc 269 Miravista Way, Vallejo 94589 | (408) 291-0006 |
| Hicks Investigations Po Box 5175, Vallejo 94591 | (707) 648-1594 |
| Maxwell & Assoc Inc 167 Robles Way, Vallejo 94591 | (707) 642-7100 |
| Mayberry Investigations Vallejo 94591 | (707) 319-7073 |