| Business | Phone |
| Dan Alvarez Alta Loma 91701 | (909) 466-8437 |
| Astro Investigations 8858 Hillside Rd, Alta Loma 91701 | (909) 980-6196 |
| Dominguez-Strong Investigation 8780 19th St # 409, Alta Loma 91701 | (909) 466-7902 |
| Stephen V Whaley Investigation Alta Loma 91701 | (909) 945-9377 |
| Stratton Investigations Inc Po Box 402, Alta Loma 91701 | (909) 945-2049 |
| Whiteaker Investigations 8780 19th St # 374, Alta Loma 91701 | (760) 247-6905 |