| Business | Phone |
| Pac-West Telecomm Inc Fairfield 94533 | (707) 402-0000 |
| Solano Communications 1419 Shelby Dr, Fairfield 94534 | (707) 428-0644 |
| Synectic Technologies Fairfield 94533 | (707) 429-0580 |
| Telpro Technologies Inc 2300 S Watney Way # F, Fairfield 94533 | (707) 426-5960 |
| Tnsi Fairfield 94533 | (707) 399-8396 |