| Business | Phone |
| Alan Peacock-Avp Invstgtn 1200 H St, Modesto 95354 | (209) 523-1600 |
| Cen-Cal Investigations Po Box 578337, Modesto 95357 | (209) 571-2515 |
| Doerksen Investigations 1200 G St # A, Modesto 95354 | (209) 526-1542 |
| Estes-Zako & Assoc 910 12th St, Modesto 95354 | (209) 575-1496 |
| Gary L Ermoian Investigations Po Box 5052, Modesto 95352 | (209) 521-9327 |
| Gold Shield Investigation 704 Ramona Ave, Modesto 95350 | (209) 524-7089 |
| Illumination Investigation Svc Po Box 1767, Modesto 95353 | (209) 606-7288 |
| Maxwell Private Investigations Modesto 95354 | (209) 522-1194 |
| Modesto Pi Modesto 95350 | (209) 571-0102 |
| Rej Investigative Svc 121 Rue De Yoe, Modesto 95354 | (209) 522-9040 |
| Rick L Baca Investigations Modesto 95350 | (209) 529-4466 |
| Stan Ross Investigations Modesto 95350 | (209) 572-2989 |
| Stockham Computer Forensics Po Box 578351, Modesto 95357 | (209) 521-7379 |