| Business | Phone |
| American Databank 820 16th St # 870, Denver 80202 | (303) 573-1130 |
| Apssi Colorado Research 7200 E Hampden Ave # 206, Denver 80224 | (303) 948-9984 |
| Custom Credentialing Svc 4103 E 105th Ave, Denver 80233 | (303) 453-4844 |
| Backgrounds Usa 1760 Gaylord St, Denver 80206 | (303) 455-8855 |
| Inspection Services Ltd 2727 W 6th Ave, Denver 80204 | (303) 573-6600 |