| Business | Phone |
| Brilliant Telecommunications 307 Orchard City Dr, Campbell 95008 | (408) 866-1896 |
| Business Telephone Exchange 450 Salmar Ave, Campbell 95008 | (408) 374-8727 |
| J P Telecom Inc 475 W Sunnyoaks Ave, Campbell 95008 | (408) 866-0500 |
| Pupco Inc 165 Cristich Ln # J, Campbell 95008 | (408) 371-4745 |
| Resource Communications 2959 Winchester Blvd, Campbell 95008 | (408) 374-3700 |
| Sal Communications 1575 Winchester Blvd, Campbell 95008 | (408) 866-0304 |
| Santa Cruz Telephone 1262 E Hamilton Ave # D, Campbell 95008 | (831) 423-8213 |
| Sylantro Systems 910 E Hamilton Ave # 300, Campbell 95008 | (408) 626-2300 |
| Ujima 1350 Dell Ave # 203, Campbell 95008 | (408) 866-6644 |
| Valley Cellular 2875 Winchester Blvd # E, Campbell 95008 | (408) 866-7185 |
| Vertel Corp 1353 Dell Ave, Campbell 95008 | (818) 703-7683 |
| Absolute Telecom, INC. 161 Curnter Ave, Campbell 95008 | (408) 371-6500 |