| Business | Phone |
| All Taxi Radio Svc 1200 Mississippi St, San Francisco 94107 | (415) 824-3426 |
| Telecommunications Engineering 409 Wildwood Dr, San Francisco 94080 | (650) 871-4200 |
| Golden Ninity-Nine Cents 723 Vallejo St, San Francisco 94133 | (415) 956-3813 |
| San Francisco Mobile Comms Po Box 27620, San Francisco 94127 | (415) 665-0309 |