| Business | Phone |
| Advantage Background Svc 3888 Pearl Rd, Cleveland 44109 | (216) 635-2638 |
| Alexandra Investigations 1112 E 125th St, Cleveland 44112 | (216) 249-3733 |
| Williams Investigation 1865 Belmore Rd, Cleveland 44112 | (216) 249-2961 |
| Willington's Investigations 15611 School Ave, Cleveland 44110 | (216) 851-3205 |
| Woodland Investigation 1849 Taylor Rd, Cleveland 44112 | (216) 249-1582 |
| Chris Investigation 1565 Belmar Rd, Cleveland 44118 | (216) 371-4107 |
| Christine's Investigation 15611 School Ave, Cleveland 44110 | (216) 451-1808 |
| Theresa's Investigation 479 E 123rd St, Cleveland 44108 | (216) 249-8780 |
| Thomas Investigation 2215 E 46th St, Cleveland 44103 | (216) 431-6071 |
| Engineering & Fire Invstgtns 5105 Stevenson St, Cleveland 44143 | (440) 442-9267 |
| Smith's Investigation 10002 Yale Ave, Cleveland 44108 | (216) 761-4576 |
| Robinsons' Investigation Svc 1849 Taylor Rd, Cleveland 44112 | (216) 851-5115 |
| G L Investigation 12819 Edmonton Ave, Cleveland 44108 | (216) 249-8339 |
| Harrison Investigations 15700 Euclid Ave # 202, Cleveland 44112 | (216) 761-2054 |
| Professional Security & Trnng 7430 York Rd # 2, Cleveland 44130 | (440) 292-2104 |
| Hunter Investigation 1422 Coit Ave # 1, Cleveland 44112 | (216) 268-0943 |
| Integra Investigations Northeast, Cleveland 44145 | (440) 892-7080 |
| Investigative Resources Inc 23200 Chagrin Blvd, Cleveland 44122 | (216) 292-8285 |
| Nicole Investigations 2042 Cliffview Rd, Cleveland 44121 | (216) 481-6718 |
| Malones Investigation 6704 Fullerton Ave, Cleveland 44105 | (216) 206-2609 |