| Business | Phone |
| Michael Agil 7349 196th Pl, Flushing 11366 | (718) 479-6966 |
| Shadow Investigations 19910 32nd Ave # 1, Flushing 11358 | (718) 279-7540 |
| Roy Clark Investigations 18804 Northern Blvd, Flushing 11358 | (718) 539-1527 |
| Wolff Investigations 6749 Fleet St, Flushing 11375 | (718) 793-1327 |
| Victor Juliano 24172 Oak Park Dr, Flushing 11362 | (718) 428-0806 |
| Quest Total Investigation Sv 5415 Junction Blvd, Flushing 11373 | (718) 760-2004 |
| Professional Investigators Ne 5239 69th St, Flushing 11378 | (718) 638-6300 |
| Fi Consultants Ltd 6446 232nd St, Flushing 11364 | (718) 423-5159 |
| Friedlander Investigative Svc 6826 Juno St, Flushing 11375 | (718) 793-1960 |
| I On You Investigation 2577 Francis Lewis Blvd, Flushing 11358 | (718) 747-5730 |
| Intercon Special Svc Inc 3352 81st St # 31, Flushing 11372 | (718) 672-2311 |
| Judge Investigations 6600 Queens Midtown Expy, Flushing 11378 | (718) 426-3500 |
| Felber Investigations 15019 16th Rd, Flushing 11357 | (718) 767-0777 |
| Millard Associates Ltd 20105 Northern Blvd, Flushing 11361 | (718) 225-8825 |
| Optimum Security Investigation 2110 163rd St, Flushing 11357 | (718) 352-1629 |
| Park Avenue Security 18802 64th Ave # 200, Flushing 11365 | (718) 264-7749 |
| Iversen & Biondo Assoc Inc 11835 Queens Blvd, Flushing 11375 | (718) 544-9595 |
| Clark Investigations Security 3410 56th St, Flushing 11377 | (718) 424-4040 |