| Business | Phone |
| Aci Institute 23367 Golden Springs Dr, Diamond Bar 91765 | (909) 860-9345 |
| Cdlm 2131 Indian Creek Rd, Diamond Bar 91765 | (909) 396-6843 |
| Jmpm 22875 Hilton Head Dr, Diamond Bar 91765 | (909) 860-3387 |
| Pai Science Svc 21308 Pathfinder Rd, Diamond Bar 91765 | (909) 860-2125 |