| Business | Phone |
| Us Tae Kwon Do Center 1365 S Diamond Bar Blvd, Diamond Bar 91765 | (909) 860-8782 |
| Issen Development 2755 Clear Creek Ln, Diamond Bar 91765 | (909) 860-9096 |
| Red Dragon Karate 341 S Diamond Bar Blvd, Diamond Bar 91765 | (909) 396-7906 |
| Remnant Kumdo School 1403 S Diamond Bar Blvd, Diamond Bar 91765 | (909) 396-1870 |
| Olympian Taekwondo 2815 S Diamond Bar Blvd, Diamond Bar 91765 | (909) 860-9777 |