| Business | Phone |
| Pylon Solutions 12647 Alcosta Blvd # 320, San Ramon 94583 | (925) 830-0908 |
| Afl Telecommunications 3420 Fostoria Way, San Ramon 94583 | (925) 327-7110 |
| Choice Communications 2842 Springdale Ln, San Ramon 94583 | (925) 556-3400 |
| My Ip Telephone Com 12647 Alcosta Blvd, San Ramon 94583 | (925) 901-0326 |
| Pac-West Telecomm Inc 130 Ryan Industrial Ct # 215, San Ramon 94583 | (925) 940-0000 |
| Teldata Control Inc 2301 Camino Ramon # 150, San Ramon 94583 | (925) 973-9700 |
| Trans-West Network Solutions San Ramon 94583 | (925) 358-0190 |
| Vcom Solutions 2682 Bishop Dr, San Ramon 94583 | (925) 244-1800 |