| Business | Phone |
| A-Baxter Investigations Denver 80224 | (303) 461-9007 |
| All Pro Survelliance 950 S Cherry St, Denver 80246 | (303) 758-1757 |
| Alpine Investigations 260 Glencoe St, Denver 80220 | (303) 399-2059 |
| Alpine Investigations 283 Columbine St, Denver 80206 | (303) 399-2029 |
| Armistead Ellis & Assoc Inc 800 E 19th Ave, Denver 80218 | (303) 825-2373 |
| Atalanta Investigations Denver 80206 | (303) 333-5513 |
| Eagle Investigations Inc 10650 Leroy Dr # 10, Denver 80233 | (303) 430-8838 |
| Jim Allen & Assoc Po Box 21172, Denver 80221 | (303) 450-4150 |
| Braddy Investigative Group 616 Washington St # 105, Denver 80203 | (303) 860-1380 |
| C D Investigative Svc 1623 Washington St, Denver 80203 | (303) 861-8732 |
| Cardinal Pointe 600 17th St # 2800, Denver 80202 | (303) 893-8903 |
| Case Sensitive Investigations 1616 17th St, Denver 80202 | (303) 628-5534 |
| Colorado Intelligence Agency Denver 80222 | (303) 753-8866 |
| Jane M Cracraft 100 Lincoln St, Denver 80203 | (303) 777-6607 |
| Cvb Investigative Svc 1471 Stuart St, Denver 80204 | (303) 969-8703 |
| Cwg Assoc Investigations 1330 Leyden St # 145, Denver 80220 | (303) 393-0294 |
| D C King Investigations 4120 E Evans Ave, Denver 80222 | (303) 756-1075 |
| David L Williams Private 150 E 10th Ave, Denver 80203 | (303) 832-5113 |
| Embassy Investigations 600 17th St # 2800, Denver 80202 | (303) 634-2245 |
| Executive Services Of Colorado Denver 80203 | (303) 831-1171 |
| Gold Medal Investigations 535 16th St, Denver 80202 | (303) 825-0445 |
| Gsr Investigative Group Denver 80202 | (303) 825-4544 |
| H Ellis & Armistead 802 E 19th Ave, Denver 80218 | (303) 825-9191 |
| Handler Investigative Group 210 Saint Paul St, Denver 80206 | (303) 377-8700 |
| Westwind Investigations Denver 80202 | (303) 251-6196 |
| Worldwide Investigations Inc Denver 80202 | (303) 297-3400 |
| Walter E Barrett & Assoc 1650 Washington St, Denver 80203 | (303) 837-1400 |
| Investigative Resources Inc 1625 Larimer St # 2802, Denver 80202 | (303) 534-1177 |
| J D Farrell Investigations Inc 600 17th St, Denver 80202 | (303) 514-8732 |
| Jerlow & Assoc Po Box 3108, Denver 80201 | (303) 839-9005 |
| La Point Evidence Photography Po Box 61504, Denver 80206 | (303) 759-3599 |
| Leiser & Assoc 4525 W 26th Ave, Denver 80212 | (303) 561-3111 |
| Steven Snyder & Assoc 1638 Logan St, Denver 80203 | (303) 863-7400 |
| Schmidt Investigations 1241 Pearl St, Denver 80203 | (303) 861-2600 |
| Sharrock Investigation 1629 York St, Denver 80206 | (303) 312-1286 |
| Shinobi Legal Svc 1550 Larimer St # 127, Denver 80202 | (720) 876-1213 |
| Mann Group Inc 600 S Cherry St, Denver 80246 | (303) 270-0021 |
| Maria Garcia Investigative Svc Denver 80202 | (720) 350-2636 |
| Mc Cormick Detective 4260 E Evans Ave, Denver 80222 | (303) 898-2000 |
| R T Assoc 8001 E Ellsworth Ave, Denver 80230 | (303) 758-8738 |
| Republic Investigations Po Box 9391, Denver 80209 | (303) 931-3131 |
| Rick Johnson & Assoc-Colorado 1649 Downing St, Denver 80218 | (303) 296-2200 |
| Professional Investigators 1630 Welton St # 300, Denver 80202 | (720) 904-7887 |
| Profind 1751 Gilpin St, Denver 80218 | (303) 316-0287 |
| Queen City Investigations Denver 80206 | (303) 321-6255 |
| Roland Process Service & Investigations 695 S Colorado Blvd Suite 480, Denver 80246 | (720) 382-1882 |