| Business | Phone |
| Affordable Telephone Instltn 2304 11th Ave, Oakland 94606 | (510) 655-5419 |
| An Overall Telephone Co Oakland 94607 | (510) 282-2743 |
| Economical Communications Svc 4100-10 Redwood Rd # 362, Oakland 94619 | (510) 336-0930 |
| Enterprise Telecom 2647 Harold St, Oakland 94602 | (510) 535-2545 |
| Franz Inc 555 12th St, Oakland 94607 | (510) 452-2000 |
| Klein Tel Communications Oakland 94612 | (510) 832-5225 |
| Logic Communications 2336 Harrison St, Oakland 94612 | (510) 834-1118 |
| Moree Cti-Web Consulting 3362 Brunell Dr, Oakland 94602 | (510) 682-6529 |
| Ottotel Communications Svc Oakland 94621 | (510) 562-5342 |
| P-Comm 641 17th St, Oakland 94612 | (510) 835-1445 |
| Pac-West Telecomm Inc 1212 Broadway # 830, Oakland 94612 | (510) 288-1234 |
| Phoneman Telecommunications Oakland 94621 | (510) 638-5959 |