| Business | Phone |
| American Karate Academy 1845 Brookfield Ct, Frederick 21701 | (301) 698-5468 |
| Bushikai 33 Hamilton Ave, Frederick 21701 | (301) 631-1136 |
| Central Maryland Martial Arts 6907 Baltimore National Pike, Frederick 21702 | (301) 473-8584 |
| Golden Knights Karate 5732 Industry Ln # A, Frederick 21704 | (301) 695-7501 |
| Kreimer's Karate Institute Inc 1460 W Patrick St # C, Frederick 21702 | (301) 695-3347 |
| Martial Arts Usa 1080 W Patrick St, Frederick 21703 | (301) 694-3330 |
| Phoenix Karate Frederick 1828 Rosemont Ave, Frederick 21702 | (301) 682-4114 |
| Rankin Martial Arts 307 E 9th St, Frederick 21701 | (301) 631-0152 |
| Self Defense Tactics Inc 124 S Carroll St, Frederick 21701 | (301) 682-8589 |