| Business | Phone |
| John D Kroeger Assoc Po Box 1147, Fair Oaks 95628 | (916) 961-5671 |
| Lawrence C Ludwig & Assoc Po Box 2510, Fair Oaks 95628 | (916) 967-4445 |
| Dane Research & Investigations Po Box 5111, Fair Oaks 95628 | (916) 798-8449 |
| Douglas W Dixon & Assoc Fair Oaks 95628 | (916) 965-1262 |
| Northstar Investigations 7844 Madison Ave # 114, Fair Oaks 95628 | (916) 966-6000 |
| Perkins Investigations Fair Oaks 95628 | (916) 535-0116 |