| Business | Phone |
| Automated Communications 2075 Corte Del Nogal, Carlsbad 92009 | (760) 745-3624 |
| Salient Networks 5750 Fleet St, Carlsbad 92008 | (760) 930-2600 |
| River Telecommunications 5845 Avenida Encinas # 130, Carlsbad 92008 | (760) 929-7990 |
| Commworld Of San Diego North Carlsbad 92008 | (760) 730-3500 |
| Cross Telecom 2382 Faraday Ave, Carlsbad 92008 | (760) 918-6780 |
| Make My Calls 2531 State St, Carlsbad 92008 | (760) 421-0535 |
| High-Tech Communications Inc Carlsbad 92008 | (760) 431-7554 |