| Business | Phone |
| Asset Investigations 3377 Deer Valley Rd # 116, Antioch 94531 | (925) 754-1115 |
| D A Morrill Private Invstgtrs Po Box 3433, Antioch 94531 | (925) 757-4127 |
| Harrison Associates Po Box 3644, Antioch 94531 | (925) 755-0911 |
| John Beaudin Investigations 3521 Davi Pl, Antioch 94509 | (925) 754-1107 |
| Lindberg & Assoc 824 Falcon Ct, Antioch 94509 | (925) 753-0381 |
| Reynolds Investigation Antioch 94509 | (925) 757-7757 |