| Business | Phone |
| Coast Telephone Exchange 1176 Main St # A, Irvine 92614 | (949) 642-1403 |
| Dbs Executive Suites 19200 Von Karman Ave # 400, Irvine 92612 | (949) 622-5400 |
| Elite Exchange 1176 Main St # A, Irvine 92614 | (949) 631-5511 |
| Excel Telemessaging 1176 Main St # A, Irvine 92614 | (949) 599-3000 |