| Business | Phone |
| Aaron Detective Bureau 6416 Corbly Rd, Cincinnati 45230 | (513) 232-9454 |
| Accelerated Solutions 629 Old State Route 74, Cincinnati 45244 | (513) 688-1103 |
| Aaa Detective Agency 7659 Montgomery Rd # 2, Cincinnati 45236 | (513) 791-2848 |
| Accelerated Solutions Cincinnati 45242 | (513) 842-3448 |
| Brenda Beyersdoerfer Quest 11427 Reed Hartman Hwy, Cincinnati 45241 | (513) 618-6447 |
| Business Intelligence Inc 6900 Murray Ave, Cincinnati 45227 | (513) 561-0100 |
| Confidential Investigations Cincinnati 45242 | (513) 936-9885 |
| Dah Private Investigators Cincinnati 45209 | (513) 249-2404 |
| Investigative Services Inc 2235 Glenside Ave, Cincinnati 45212 | (513) 531-1778 |
| J Lafaette & Assoc 11137 Main St, Cincinnati 45241 | (513) 563-9994 |
| Lawrence E Handorf & Assoc 632 Vine St, Cincinnati 45202 | (513) 381-4200 |
| Quest Associates Of Ohio 4771 Glendale Milford Rd, Cincinnati 45242 | (513) 984-6447 |
| Shamus Detective Agency 8060 Montgomery Rd # 210b, Cincinnati 45236 | (513) 793-6838 |
| Superior Service Bureau Po Box 315, Cincinnati 45201 | (513) 421-9483 |