| Business | Phone |
| Accutel Communications 23984 Clawiter Rd, Hayward 94545 | (510) 786-6066 |
| Del Rio Communications 109 Jackson St, Hayward 94544 | (510) 889-1722 |
| Lee Data Communication 23575 Cabot Blvd, Hayward 94545 | (510) 785-7000 |
| Westech Communications Inc 23677 Foley St, Hayward 94545 | (925) 328-0124 |