| Business | Phone |
| C D Communications Svc 13 Corporate Plaza Dr # 120, Newport Beach 92660 | (949) 640-5400 |
| Avaya Inc 5000 Birch St # 3000, Newport Beach 92660 | (949) 260-2046 |
| Digitel Corp Newport Beach 92660 | (949) 752-7000 |
| Rambo Communications Inc 20172 Sw Cypress St, Newport Beach 92660 | (949) 852-1004 |
| Mci 3919 Westerly Pl # 1002, Newport Beach 92660 | (949) 476-1930 |