| Business | Phone |
| Ammstar 41669 Covington Dr, Fremont 94539 | (510) 353-0900 |
| Ample Communication Inc 4034 Clipper Ct, Fremont 94538 | (510) 657-1500 |
| Avid Communications 45554 Industrial Pl, Fremont 94538 | (510) 353-0587 |
| Bay Area Voice & Data Fremont 94538 | (510) 744-9507 |
| Bula Fiji Fremont 94538 | (510) 818-0442 |
| California Residential Phones 34430 Benedick Ln, Fremont 94555 | (510) 487-7177 |
| Cornerstone Telecommunications 46560 Fremont Blvd # 202, Fremont 94538 | (510) 661-9299 |
| First Com 1227 Albacore Ter, Fremont 94536 | (510) 818-9969 |
| Free Communications 34460 Fremont Blvd # F, Fremont 94555 | (510) 745-8883 |
| Impact Communications 46875 Warm Springs Blvd, Fremont 94539 | (510) 659-8488 |
| Northern Star Telecom Inc 43108 Christy St, Fremont 94538 | (510) 440-0112 |
| Global Telemann System Inc 163 Whitney Pl, Fremont 94539 | (510) 979-1416 |
| Go Digital Telecom 4050 Starboard Dr, Fremont 94538 | (510) 623-1462 |
| Go Digital Telecommunications 3450 W Warren Ave, Fremont 94538 | (510) 979-2200 |
| Spear Voice Systems Inc 45711 Tuscany Ct, Fremont 94539 | (510) 623-1800 |
| Westel Systems Inc 3360 Seldon Ct, Fremont 94539 | (510) 574-1800 |
| Silver & Black Telecom 4526 Crestwood St, Fremont 94538 | (510) 279-9411 |
| Vicomptel Inc 4011 Clipper Ct, Fremont 94538 | (510) 252-9688 |
| Zynx Networks 48421 Milmont Dr, Fremont 94538 | (510) 445-2212 |